fixes #219, able to compile multiple entry points

tool/sdk_expected_errors.txt

Index: tool/sdk_expected_errors.txt
diff --git a/tool/sdk_expected_errors.txt b/tool/sdk_expected_errors.txt
index 8f5516bc33a31f595e03d16e24202ae200fd131c..96eec9196c61d0e83a5fbdf40be5dfd6151ab708 100644
--- a/tool/sdk_expected_errors.txt
+++ b/tool/sdk_expected_errors.txt
@@ -1,1152 +1,384 @@
-warning: line 168, column 14 of dart:isolate: [DownCastComposite] IsolateNatives.spawnFunction(entryPoint, message, paused).then((msg) => new Isolate(msg[1], pauseCapability: msg[2], terminateCapability: msg[3])) (Future<dynamic>) will need runtime check to cast to type Future<Isolate>
-      return IsolateNatives.spawnFunction(entryPoint, message, paused)
-             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 234, column 14 of dart:isolate: [DownCastComposite] IsolateNatives.spawnUri(uri, args, message, paused).then((msg) => new Isolate(msg[1], pauseCapability: msg[2], terminateCapability: msg[3])) (Future<dynamic>) will need runtime check to cast to type Future<Isolate>
-      return IsolateNatives.spawnUri(uri, args, message, paused)
-             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 426, column 16 of dart:math: [DownCastImplicit] rnd32.remainder(max) (num) will need runtime check to cast to type int
-      result = rnd32.remainder(max); // % max;
-               ^^^^^^^^^^^^^^^^^^^^
-warning: line 37, column 25 of dart:math/point.dart: [DownCastComposite] x + other.x (num) will need runtime check to cast to type T
-    return new Point<T>(x + other.x, y + other.y);
-                        ^^^^^^^^^^^
-warning: line 37, column 38 of dart:math/point.dart: [DownCastComposite] y + other.y (num) will need runtime check to cast to type T
-    return new Point<T>(x + other.x, y + other.y);
-                                     ^^^^^^^^^^^
-warning: line 46, column 25 of dart:math/point.dart: [DownCastComposite] x - other.x (num) will need runtime check to cast to type T
-    return new Point<T>(x - other.x, y - other.y);
-                        ^^^^^^^^^^^
-warning: line 46, column 38 of dart:math/point.dart: [DownCastComposite] y - other.y (num) will need runtime check to cast to type T
-    return new Point<T>(x - other.x, y - other.y);
-                                     ^^^^^^^^^^^
-warning: line 59, column 25 of dart:math/point.dart: [DownCastComposite] x * factor (num) will need runtime check to cast to type T
-    return new Point<T>(x * factor, y * factor);
-                        ^^^^^^^^^^
-warning: line 59, column 37 of dart:math/point.dart: [DownCastComposite] y * factor (num) will need runtime check to cast to type T
-    return new Point<T>(x * factor, y * factor);
-                                    ^^^^^^^^^^
-warning: line 86, column 12 of dart:math/point.dart: [DownCastComposite] dx * dx + dy * dy (num) will need runtime check to cast to type T
-    return dx * dx + dy * dy;
-           ^^^^^^^^^^^^^^^^^
-warning: line 33, column 18 of dart:math/rectangle.dart: [DownCastComposite] left + width (num) will need runtime check to cast to type T
-  T get right => left + width;
-                 ^^^^^^^^^^^^
-warning: line 35, column 19 of dart:math/rectangle.dart: [DownCastComposite] top + height (num) will need runtime check to cast to type T
-  T get bottom => top + height;
-                  ^^^^^^^^^^^^
-warning: line 68, column 33 of dart:math/rectangle.dart: [DownCastComposite] x0 (num) will need runtime check to cast to type T
-        return new Rectangle<T>(x0, y0, x1 - x0, y1 - y0);
-                                ^^
-warning: line 68, column 37 of dart:math/rectangle.dart: [DownCastComposite] y0 (num) will need runtime check to cast to type T
-        return new Rectangle<T>(x0, y0, x1 - x0, y1 - y0);
-                                    ^^
-warning: line 68, column 41 of dart:math/rectangle.dart: [DownCastComposite] x1 - x0 (num) will need runtime check to cast to type T
-        return new Rectangle<T>(x0, y0, x1 - x0, y1 - y0);
-                                        ^^^^^^^
-warning: line 68, column 50 of dart:math/rectangle.dart: [DownCastComposite] y1 - y0 (num) will need runtime check to cast to type T
-        return new Rectangle<T>(x0, y0, x1 - x0, y1 - y0);
-                                                 ^^^^^^^
-warning: line 95, column 29 of dart:math/rectangle.dart: [DownCastComposite] left (num) will need runtime check to cast to type T
-    return new Rectangle<T>(left, top, right - left, bottom - top);
-                            ^^^^
-warning: line 95, column 35 of dart:math/rectangle.dart: [DownCastComposite] top (num) will need runtime check to cast to type T
-    return new Rectangle<T>(left, top, right - left, bottom - top);
-                                  ^^^
-warning: line 95, column 40 of dart:math/rectangle.dart: [DownCastComposite] right - left (num) will need runtime check to cast to type T
-    return new Rectangle<T>(left, top, right - left, bottom - top);
-                                       ^^^^^^^^^^^^
-warning: line 95, column 54 of dart:math/rectangle.dart: [DownCastComposite] bottom - top (num) will need runtime check to cast to type T
-    return new Rectangle<T>(left, top, right - left, bottom - top);
-                                                     ^^^^^^^^^^^^
-warning: line 119, column 41 of dart:math/rectangle.dart: [DownCastComposite] this.left + this.width (num) will need runtime check to cast to type T
-  Point<T> get topRight => new Point<T>(this.left + this.width, this.top);
-                                        ^^^^^^^^^^^^^^^^^^^^^^
-warning: line 120, column 44 of dart:math/rectangle.dart: [DownCastComposite] this.left + this.width (num) will need runtime check to cast to type T
-  Point<T> get bottomRight => new Point<T>(this.left + this.width,
-                                           ^^^^^^^^^^^^^^^^^^^^^^
-warning: line 121, column 7 of dart:math/rectangle.dart: [DownCastComposite] this.top + this.height (num) will need runtime check to cast to type T
-      this.top + this.height);
-      ^^^^^^^^^^^^^^^^^^^^^^
-warning: line 123, column 7 of dart:math/rectangle.dart: [DownCastComposite] this.top + this.height (num) will need runtime check to cast to type T
-      this.top + this.height);
-      ^^^^^^^^^^^^^^^^^^^^^^
-warning: line 151, column 22 of dart:math/rectangle.dart: [DownCastComposite] (width < 0) ? -width * 0 : width (num) will need runtime check to cast to type T
-      : this.width = (width < 0) ? -width * 0 : width,  // Inline _clampToZero.
-                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 152, column 23 of dart:math/rectangle.dart: [DownCastComposite] (height < 0) ? -height * 0 : height (num) will need runtime check to cast to type T
-        this.height = (height < 0) ?  -height * 0 : height;
-                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 167, column 14 of dart:math/rectangle.dart: [DownCastComposite] min(a.x, b.x) (num) will need runtime check to cast to type T
-    T left = min(a.x, b.x);
-             ^^^^^^^^^^^^^
-warning: line 168, column 15 of dart:math/rectangle.dart: [DownCastComposite] max(a.x, b.x) - left (num) will need runtime check to cast to type T
-    T width = max(a.x, b.x) - left;
-              ^^^^^^^^^^^^^^^^^^^^
-warning: line 169, column 13 of dart:math/rectangle.dart: [DownCastComposite] min(a.y, b.y) (num) will need runtime check to cast to type T
-    T top = min(a.y, b.y);
-            ^^^^^^^^^^^^^
-warning: line 170, column 16 of dart:math/rectangle.dart: [DownCastComposite] max(a.y, b.y) - top (num) will need runtime check to cast to type T
-    T height = max(a.y, b.y) - top;
-               ^^^^^^^^^^^^^^^^^^^
-warning: line 212, column 23 of dart:math/rectangle.dart: [DownCastComposite] (width < 0) ? _clampToZero(width) : width (num) will need runtime check to cast to type T
-      : this._width = (width < 0) ? _clampToZero(width) : width,
-                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 213, column 24 of dart:math/rectangle.dart: [DownCastComposite] (height < 0) ? _clampToZero(height) : height (num) will need runtime check to cast to type T
-        this._height = (height < 0) ? _clampToZero(height) : height;
-                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 228, column 14 of dart:math/rectangle.dart: [DownCastComposite] min(a.x, b.x) (num) will need runtime check to cast to type T
-    T left = min(a.x, b.x);
-             ^^^^^^^^^^^^^
-warning: line 229, column 15 of dart:math/rectangle.dart: [DownCastComposite] max(a.x, b.x) - left (num) will need runtime check to cast to type T
-    T width = max(a.x, b.x) - left;
-              ^^^^^^^^^^^^^^^^^^^^
-warning: line 230, column 13 of dart:math/rectangle.dart: [DownCastComposite] min(a.y, b.y) (num) will need runtime check to cast to type T
-    T top = min(a.y, b.y);
-            ^^^^^^^^^^^^^
-warning: line 231, column 16 of dart:math/rectangle.dart: [DownCastComposite] max(a.y, b.y) - top (num) will need runtime check to cast to type T
-    T height = max(a.y, b.y) - top;
-               ^^^^^^^^^^^^^^^^^^^
-warning: line 247, column 28 of dart:math/rectangle.dart: [DownCastComposite] _clampToZero(width) (num) will need runtime check to cast to type T
-    if (width < 0) width = _clampToZero(width);
-                           ^^^^^^^^^^^^^^^^^^^
-warning: line 263, column 30 of dart:math/rectangle.dart: [DownCastComposite] _clampToZero(height) (num) will need runtime check to cast to type T
-    if (height < 0) height = _clampToZero(height);
-                             ^^^^^^^^^^^^^^^^^^^^
-severe: line 29, column 45 of dart:_interceptors: [AnalyzerMessage] Classes cannot implement 'bool'
-class JSBool extends Interceptor implements bool {
-                                            ^^^^
-warning: line 80, column 12 of dart:_interceptors/js_array.dart: [DownCastComposite] JS('var', r'#.pop()', this) (dynamic) will need runtime check to cast to type E
-    return JS('var', r'#.pop()', this);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 125, column 9 of dart:_interceptors/js_array.dart: [DownCastComposite] JS('', '#[#]', this, i) (dynamic) will need runtime check to cast to type E
-      f(JS('', '#[#]', this, i));
-        ^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 161, column 12 of dart:_interceptors/js_array.dart: [DownCastComposite] IterableMixinWorkaround.reduce(this, combine) (dynamic) will need runtime check to cast to type E
-    return IterableMixinWorkaround.reduce(this, combine);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 169, column 12 of dart:_interceptors/js_array.dart: [DownCastComposite] IterableMixinWorkaround.firstWhere(this, test, orElse) (dynamic) will need runtime check to cast to type E
-    return IterableMixinWorkaround.firstWhere(this, test, orElse);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 173, column 12 of dart:_interceptors/js_array.dart: [DownCastComposite] IterableMixinWorkaround.lastWhereList(this, test, orElse) (dynamic) will need runtime check to cast to type E
-    return IterableMixinWorkaround.lastWhereList(this, test, orElse);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 177, column 12 of dart:_interceptors/js_array.dart: [DownCastComposite] IterableMixinWorkaround.singleWhere(this, test) (dynamic) will need runtime check to cast to type E
-    return IterableMixinWorkaround.singleWhere(this, test);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 313, column 12 of dart:_interceptors/js_array.dart: [DownCastComposite] JS('var', '#[#]', this, index) (dynamic) will need runtime check to cast to type E
-    return JS('var', '#[#]', this, index);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-severe: line 420, column 44 of dart:_interceptors/js_number.dart: [AnalyzerMessage] Classes cannot implement 'double'
-class JSDouble extends JSNumber implements double {
-                                           ^^^^^^
-severe: line 349, column 41 of dart:_interceptors/js_number.dart: [AnalyzerMessage] Classes cannot implement 'int'
-class JSInt extends JSNumber implements int, double {
-                                        ^^^
-severe: line 16, column 47 of dart:_interceptors/js_number.dart: [AnalyzerMessage] Classes cannot implement 'num'
-class JSNumber extends Interceptor implements num {
-                                              ^^^
-severe: line 110, column 17 of dart:_interceptors/js_number.dart: [AnalyzerMessage] The return type 'JSNumber' is not a 'double', as defined by the method 'toDouble'
-  toDouble() => this;
-                ^^^^
-severe: line 349, column 46 of dart:_interceptors/js_number.dart: [AnalyzerMessage] Classes cannot implement 'double'
-class JSInt extends JSNumber implements int, double {
-                                             ^^^^^^
-warning: line 83, column 28 of dart:_interceptors/js_number.dart: [DownCastImplicit] JS('num', r'Math.ceil(#)', this) (num) will need runtime check to cast to type double
-  double ceilToDouble() => JS('num', r'Math.ceil(#)', this);
-                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 85, column 29 of dart:_interceptors/js_number.dart: [DownCastImplicit] JS('num', r'Math.floor(#)', this) (num) will need runtime check to cast to type double
-  double floorToDouble() => JS('num', r'Math.floor(#)', this);
-                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 89, column 14 of dart:_interceptors/js_number.dart: [DownCastImplicit] JS('num', r'-Math.round(-#)', this) (num) will need runtime check to cast to type double
-      return JS('num', r'-Math.round(-#)', this);
-             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 91, column 14 of dart:_interceptors/js_number.dart: [DownCastImplicit] JS('num', r'Math.round(#)', this) (num) will need runtime check to cast to type double
-      return JS('num', r'Math.round(#)', this);
-             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-severe: line 110, column 17 of dart:_interceptors/js_number.dart: [StaticTypeError] Type check failed: this (JSNumber) is not of type double
-  toDouble() => this;
-                ^^^^
-severe: line 349, column 13 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.abs (() → num) is not a subtype of int.abs (() → int).
-class JSInt extends JSNumber implements int, double {
-            ^^^^^^^^^^^^^^^^
-severe: line 349, column 13 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.unary- (() → num) is not a subtype of int.unary- (() → int).
-class JSInt extends JSNumber implements int, double {
-            ^^^^^^^^^^^^^^^^
-severe: line 349, column 13 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.<< ((num) → num) is not a subtype of int.<< ((int) → int).
-class JSInt extends JSNumber implements int, double {
-            ^^^^^^^^^^^^^^^^
-severe: line 349, column 13 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.>> ((num) → num) is not a subtype of int.>> ((int) → int).
-class JSInt extends JSNumber implements int, double {
-            ^^^^^^^^^^^^^^^^
-severe: line 349, column 13 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.& ((num) → num) is not a subtype of int.& ((int) → int).
-class JSInt extends JSNumber implements int, double {
-            ^^^^^^^^^^^^^^^^
-severe: line 349, column 13 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.| ((num) → num) is not a subtype of int.| ((int) → int).
-class JSInt extends JSNumber implements int, double {
-            ^^^^^^^^^^^^^^^^
-severe: line 349, column 13 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.^ ((num) → num) is not a subtype of int.^ ((int) → int).
-class JSInt extends JSNumber implements int, double {
-            ^^^^^^^^^^^^^^^^
-severe: line 349, column 13 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.sign (() → num) is not a subtype of int.sign (() → int).
-class JSInt extends JSNumber implements int, double {
-            ^^^^^^^^^^^^^^^^
-warning: line 357, column 12 of dart:_interceptors/js_number.dart: [DownCastImplicit] this & ((1 << width) - 1) (num) will need runtime check to cast to type int
-    return this & ((1 << width) - 1);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 362, column 12 of dart:_interceptors/js_number.dart: [DownCastImplicit] (this & (signMask - 1)) - (this & signMask) (num) will need runtime check to cast to type int
-    return (this & (signMask - 1)) - (this & signMask);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-severe: line 420, column 16 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.remainder ((num) → num) is not a subtype of double.remainder ((num) → double).
-class JSDouble extends JSNumber implements double {
-               ^^^^^^^^^^^^^^^^
-severe: line 420, column 16 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.abs (() → num) is not a subtype of double.abs (() → double).
-class JSDouble extends JSNumber implements double {
-               ^^^^^^^^^^^^^^^^
-severe: line 420, column 16 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.unary- (() → num) is not a subtype of double.unary- (() → double).
-class JSDouble extends JSNumber implements double {
-               ^^^^^^^^^^^^^^^^
-severe: line 420, column 16 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.+ ((num) → num) is not a subtype of double.+ ((num) → double).
-class JSDouble extends JSNumber implements double {
-               ^^^^^^^^^^^^^^^^
-severe: line 420, column 16 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.- ((num) → num) is not a subtype of double.- ((num) → double).
-class JSDouble extends JSNumber implements double {
-               ^^^^^^^^^^^^^^^^
-severe: line 420, column 16 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.* ((num) → num) is not a subtype of double.* ((num) → double).
-class JSDouble extends JSNumber implements double {
-               ^^^^^^^^^^^^^^^^
-severe: line 420, column 16 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.% ((num) → num) is not a subtype of double.% ((num) → double).
-class JSDouble extends JSNumber implements double {
-               ^^^^^^^^^^^^^^^^
-severe: line 420, column 16 of dart:_interceptors/js_number.dart: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.sign (() → num) is not a subtype of double.sign (() → double).
-class JSDouble extends JSNumber implements double {
-               ^^^^^^^^^^^^^^^^
-severe: line 14, column 47 of dart:_interceptors/js_string.dart: [AnalyzerMessage] Classes cannot implement 'String'
-class JSString extends Interceptor implements String, JSIndexable {
-                                              ^^^^^^
-warning: line 86, column 14 of dart:_interceptors/js_string.dart: [DownCastComposite] JS('JSExtendableArray', r'#.split(#)', this, pattern) (dynamic) will need runtime check to cast to type List<String>
-      return JS('JSExtendableArray', r'#.split(#)', this, pattern);
-             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 89, column 14 of dart:_interceptors/js_string.dart: [DownCastComposite] JS('JSExtendableArray', r'#.split(#)', this, re) (dynamic) will need runtime check to cast to type List<String>
-      return JS('JSExtendableArray', r'#.split(#)', this, re);
-             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-severe: line 346, column 7 of dart:_interceptors/js_string.dart: [StaticTypeError] Type check failed: s += s (String) is not of type JSString
-      s += s;
-      ^^^^^^
-severe: line 452, column 28 of dart:_native_typed_data: [AnalyzerMessage] The getter 'length' is not defined for the class 'NativeTypedData'
-        if (length == list.length) {
-                           ^^^^^^
-severe: line 427, column 20 of dart:_native_typed_data: [AnalyzerMessage] The final variable 'buffer' must be initialized
-  final ByteBuffer buffer;
-                   ^^^^^^
-severe: line 24, column 13 of dart:_native_typed_data: [AnalyzerMessage] The final variable 'lengthInBytes' must be initialized
-  final int lengthInBytes;
-            ^^^^^^^^^^^^^
-severe: line 446, column 13 of dart:_native_typed_data: [AnalyzerMessage] The final variable 'elementSizeInBytes' must be initialized
-  final int elementSizeInBytes;
-            ^^^^^^^^^^^^^^^^^^
-severe: line 439, column 13 of dart:_native_typed_data: [AnalyzerMessage] The final variable 'offsetInBytes' must be initialized
-  final int offsetInBytes;
-            ^^^^^^^^^^^^^
-severe: line 433, column 13 of dart:_native_typed_data: [AnalyzerMessage] The final variable 'lengthInBytes' must be initialized
-  final int lengthInBytes;
-            ^^^^^^^^^^^^^
-warning: line 201, column 9 of dart:_native_typed_data: [DownCastImplicit] _storage.sublist(start * 4, end * 4) (List<double>) will need runtime check to cast to type NativeFloat32List
-        _storage.sublist(start * 4, end * 4));
-        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 311, column 9 of dart:_native_typed_data: [DownCastImplicit] _storage.sublist(start * 4, end * 4) (List<int>) will need runtime check to cast to type Int32List
-        _storage.sublist(start * 4, end * 4));
-        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 415, column 9 of dart:_native_typed_data: [DownCastImplicit] _storage.sublist(start * 2, end * 2) (List<double>) will need runtime check to cast to type NativeFloat64List
-        _storage.sublist(start * 2, end * 2));
-        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1106, column 12 of dart:_native_typed_data: [DownCastImplicit] length == null ? _create2(buffer, offsetInBytes) : _create3(buffer, offsetInBytes, length) (Int8List) will need runtime check to cast to type NativeInt8List
-    return length == null
-           ^^^^^^^^^^^^^^^
-warning: line 574, column 29 of dart:_isolate_helper: [DownCastComposite] doneHandlers (dynamic) will need runtime check to cast to type Iterable<SendPort>
-      for (SendPort port in doneHandlers) {
-                            ^^^^^^^^^^^^
-warning: line 833, column 37 of dart:_isolate_helper: [DownCastComposite] args (dynamic) will need runtime check to cast to type List<String>
-          _startIsolate(entryPoint, args, message,
-                                    ^^^^
-warning: line 880, column 11 of dart:_isolate_helper: [DownCastComposite] msg['args'] (dynamic) will need runtime check to cast to type List<String>
-          msg['args'], msg['msg'],
-          ^^^^^^^^^^^
-warning: line 89, column 38 of dart:_isolate_helper/isolate_serialization.dart: [DownCastImplicit] indexable (JSIndexable) will need runtime check to cast to type JSArray<dynamic>
-    List serialized = serializeArray(indexable);
-                                     ^^^^^^^^^
-warning: line 120, column 24 of dart:_isolate_helper/isolate_serialization.dart: [DownCastImplicit] serializeTearOff (Function) will need runtime check to cast to type (dynamic) → dynamic
-            x.keys.map(serializeTearOff).toList(),
-                       ^^^^^^^^^^^^^^^^
-warning: line 121, column 26 of dart:_isolate_helper/isolate_serialization.dart: [DownCastImplicit] serializeTearOff (Function) will need runtime check to cast to type (dynamic) → dynamic
-            x.values.map(serializeTearOff).toList()];
-                         ^^^^^^^^^^^^^^^^
-warning: line 172, column 52 of dart:_isolate_helper/isolate_serialization.dart: [DownCastImplicit] fields (List<dynamic>) will need runtime check to cast to type JSArray<dynamic>
-    return ['dart', classId, serializeArrayInPlace(fields)];
-                                                   ^^^^^^
-warning: line 250, column 58 of dart:_isolate_helper/isolate_serialization.dart: [DownCastImplicit] result (List<dynamic>) will need runtime check to cast to type JSArray<dynamic>
-    return new JSArray.markFixed(deserializeArrayInPlace(result));
-                                                         ^^^^^^
-warning: line 258, column 61 of dart:_isolate_helper/isolate_serialization.dart: [DownCastImplicit] result (List<dynamic>) will need runtime check to cast to type JSArray<dynamic>
-    return new JSArray.markGrowable(deserializeArrayInPlace(result));
-                                                            ^^^^^^
-warning: line 266, column 36 of dart:_isolate_helper/isolate_serialization.dart: [DownCastImplicit] result (List<dynamic>) will need runtime check to cast to type JSArray<dynamic>
-    return deserializeArrayInPlace(result);
-                                   ^^^^^^
-warning: line 275, column 58 of dart:_isolate_helper/isolate_serialization.dart: [DownCastImplicit] result (List<dynamic>) will need runtime check to cast to type JSArray<dynamic>
-    return new JSArray.markFixed(deserializeArrayInPlace(result));
-                                                         ^^^^^^
-warning: line 357, column 29 of dart:_isolate_helper/isolate_serialization.dart: [DownCastImplicit] fields (List<dynamic>) will need runtime check to cast to type JSArray<dynamic>
-    deserializeArrayInPlace(fields);
-                            ^^^^^^
-warning: line 20, column 39 of dart:async/async_error.dart: [DownCastImplicit] errorHandler (Function) will need runtime check to cast to type (dynamic) → dynamic
-    return zone.registerUnaryCallback(errorHandler);
-                                      ^^^^^^^^^^^^
-severe: line 208, column 22 of dart:async/broadcast_stream_controller.dart: [AnalyzerMessage] The getter '_isFiring' is not defined for the class 'StreamSubscription<T>'
-    if (subscription._isFiring) {
-                     ^^^^^^^^^
-severe: line 206, column 32 of dart:async/broadcast_stream_controller.dart: [AnalyzerMessage] The getter '_next' is not defined for the class 'StreamSubscription<T>'
-    if (identical(subscription._next, subscription)) return null;
-                               ^^^^^
-severe: line 207, column 36 of dart:async/broadcast_stream_controller.dart: [AnalyzerMessage] The getter '_next' is not defined for the class 'StreamSubscription<T>'
-    assert(!identical(subscription._next, subscription));
-                                   ^^^^^
-severe: line 209, column 20 of dart:async/broadcast_stream_controller.dart: [AnalyzerMessage] The method '_setRemoveAfterFiring' is not defined for the class 'StreamSubscription<T>'
-      subscription._setRemoveAfterFiring();
-                   ^^^^^^^^^^^^^^^^^^^^^
-severe: line 211, column 38 of dart:async/broadcast_stream_controller.dart: [AnalyzerMessage] The getter '_next' is not defined for the class 'StreamSubscription<T>'
-      assert(!identical(subscription._next, subscription));
-                                     ^^^^^
-warning: line 8, column 67 of dart:async/broadcast_stream_controller.dart: [DownCastComposite] controller (_StreamControllerLifecycle<dynamic>) will need runtime check to cast to type _StreamControllerLifecycle<T>
-  _BroadcastStream(_StreamControllerLifecycle controller) : super(controller);
-                                                                  ^^^^^^^^^^
-warning: line 36, column 15 of dart:async/broadcast_stream_controller.dart: [DownCastComposite] controller (_StreamControllerLifecycle<dynamic>) will need runtime check to cast to type _StreamControllerLifecycle<T>
-      : super(controller, onData, onError, onDone, cancelOnError) {
-              ^^^^^^^^^^
-warning: line 40, column 52 of dart:async/broadcast_stream_controller.dart: [DownCastComposite] super._controller (_StreamControllerLifecycle<T>) will need runtime check to cast to type _BroadcastStreamController<T>
-  _BroadcastStreamController<T> get _controller => super._controller;
-                                                   ^^^^^^^^^^^^^^^^^
-warning: line 196, column 18 of dart:async/broadcast_stream_controller.dart: [DownCastComposite] subscription (StreamSubscription<dynamic>) will need runtime check to cast to type _BroadcastSubscription<T>
-    _addListener(subscription);
-                 ^^^^^^^^^^^^
-warning: line 201, column 12 of dart:async/broadcast_stream_controller.dart: [DownCastComposite] subscription (StreamSubscription<dynamic>) will need runtime check to cast to type StreamSubscription<T>
-    return subscription;
-           ^^^^^^^^^^^^
-warning: line 212, column 23 of dart:async/broadcast_stream_controller.dart: [DownCastComposite] subscription (StreamSubscription<T>) will need runtime check to cast to type _BroadcastSubscription<T>
-      _removeListener(subscription);
-                      ^^^^^^^^^^^^
-warning: line 309, column 48 of dart:async/broadcast_stream_controller.dart: [DownCastComposite] link (_BroadcastSubscriptionLink) will need runtime check to cast to type _BroadcastSubscription<T>
-      _BroadcastSubscription<T> subscription = link;
-                                               ^^^^
-warning: line 372, column 24 of dart:async/broadcast_stream_controller.dart: [UninferredClosure] (_BroadcastSubscription<T> subscription) {subscription._close();} ((_BroadcastSubscription<T>) → dynamic) will need runtime check to cast to type (_BufferingStreamSubscription<T>) → void
-      _forEachListener((_BroadcastSubscription<T> subscription) {
-                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 393, column 48 of dart:async/broadcast_stream_controller.dart: [DownCastComposite] link (_BroadcastSubscriptionLink) will need runtime check to cast to type _BroadcastSubscription<T>
-      _BroadcastSubscription<T> subscription = link;
-                                               ^^^^
-warning: line 402, column 48 of dart:async/broadcast_stream_controller.dart: [DownCastComposite] link (_BroadcastSubscriptionLink) will need runtime check to cast to type _BroadcastSubscription<T>
-      _BroadcastSubscription<T> subscription = link;
-                                               ^^^^
-warning: line 412, column 50 of dart:async/broadcast_stream_controller.dart: [DownCastComposite] link (_BroadcastSubscriptionLink) will need runtime check to cast to type _BroadcastSubscription<T>
-        _BroadcastSubscription<T> subscription = link;
-                                                 ^^^^
-warning: line 123, column 12 of dart:async/future.dart: [DownCastComposite] result (_Future<dynamic>) will need runtime check to cast to type Future<T>
-    return result;
-           ^^^^^^
-warning: line 149, column 12 of dart:async/future.dart: [DownCastComposite] result (_Future<dynamic>) will need runtime check to cast to type Future<T>
-    return result;
-           ^^^^^^
-warning: line 233, column 12 of dart:async/future.dart: [DownCastComposite] result (_Future<dynamic>) will need runtime check to cast to type Future<T>
-    return result;
-           ^^^^^^
-warning: line 112, column 12 of dart:async/future_impl.dart: [DownCastImplicit] callback (Function) will need runtime check to cast to type (dynamic) → dynamic
-    return callback;
-           ^^^^^^^^
-warning: line 117, column 12 of dart:async/future_impl.dart: [DownCastComposite] callback (Function) will need runtime check to cast to type (dynamic) → bool
-    return callback;
-           ^^^^^^^^
-warning: line 121, column 12 of dart:async/future_impl.dart: [DownCastImplicit] callback (Function) will need runtime check to cast to type () → dynamic
-    return callback;
-           ^^^^^^^^
-warning: line 208, column 11 of dart:async/future_impl.dart: [DownCastComposite] result._zone.registerUnaryCallback(f) ((dynamic) → dynamic) will need runtime check to cast to type (T) → dynamic
-      f = result._zone.registerUnaryCallback(f);
-          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 221, column 32 of dart:async/future_impl.dart: [DownCastComposite] result._zone.registerUnaryCallback(test) ((dynamic) → dynamic) will need runtime check to cast to type (dynamic) → bool
-      if (test != null) test = result._zone.registerUnaryCallback(test);
-                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 233, column 12 of dart:async/future_impl.dart: [DownCastComposite] result (_Future<dynamic>) will need runtime check to cast to type Future<T>
-    return result;
-           ^^^^^^
-warning: line 245, column 12 of dart:async/future_impl.dart: [DownCastComposite] _resultOrListeners (dynamic) will need runtime check to cast to type T
-    return _resultOrListeners;
-           ^^^^^^^^^^^^^^^^^^
-warning: line 347, column 17 of dart:async/future_impl.dart: [DownCastComposite] value (dynamic) will need runtime check to cast to type T
-      _setValue(value);
-                ^^^^^
-warning: line 357, column 15 of dart:async/future_impl.dart: [DownCastComposite] value (dynamic) will need runtime check to cast to type T
-    _setValue(value);
-              ^^^^^
-warning: line 386, column 31 of dart:async/future_impl.dart: [DownCastComposite] value (dynamic) will need runtime check to cast to type Future<T>
-      Future<T> typedFuture = value;
-                              ^^^^^
-warning: line 388, column 33 of dart:async/future_impl.dart: [DownCastComposite] typedFuture (Future<T>) will need runtime check to cast to type _Future<T>
-        _Future<T> coreFuture = typedFuture;
-                                ^^^^^^^^^^^
-warning: line 407, column 22 of dart:async/future_impl.dart: [DownCastComposite] value (dynamic) will need runtime check to cast to type T
-      T typedValue = value;
-                     ^^^^^
-warning: line 515, column 54 of dart:async/future_impl.dart: [DownCastImplicit] errorCallback (Function) will need runtime check to cast to type (dynamic) → dynamic
-                listenerValueOrError = zone.runUnary(errorCallback,
-                                                     ^^^^^^^^^^^^^
-warning: line 66, column 61 of dart:async/schedule_microtask.dart: [DownCastComposite] callback (dynamic) will need runtime check to cast to type () → void
-    _nextCallback = _lastCallback = new _AsyncCallbackEntry(callback);
-                                                            ^^^^^^^^
-warning: line 71, column 60 of dart:async/schedule_microtask.dart: [DownCastComposite] callback (dynamic) will need runtime check to cast to type () → void
-    _AsyncCallbackEntry newEntry = new _AsyncCallbackEntry(callback);
-                                                           ^^^^^^^^
-warning: line 84, column 55 of dart:async/schedule_microtask.dart: [DownCastComposite] callback (dynamic) will need runtime check to cast to type () → void
-  _AsyncCallbackEntry entry = new _AsyncCallbackEntry(callback);
-                                                      ^^^^^^^^
-severe: line 321, column 34 of dart:async/stream.dart: [AnalyzerMessage] The getter '_addError' is not defined for the class 'StreamController'
-      final addError = eventSink._addError;
-                                 ^^^^^^^^^
-severe: line 1227, column 17 of dart:async/stream.dart: [AnalyzerMessage] The method '_addError' is not defined for the class 'StreamController'
-      eventSink._addError(error, stackTrace);  // Avoid Zone error replacement.
-                ^^^^^^^^^
-severe: line 396, column 30 of dart:async/stream.dart: [AnalyzerMessage] The getter '_addError' is not defined for the class 'StreamController'
-          onError: eventSink._addError,  // Avoid Zone error replacement.
-                             ^^^^^^^^^
-warning: line 90, column 25 of dart:async/stream.dart: [DownCastComposite] value (dynamic) will need runtime check to cast to type T
-        controller._add(value);
-                        ^^^^^
-warning: line 217, column 41 of dart:async/stream.dart: [DownCastComposite] mapSink ((EventSink<T>) → EventSink<dynamic>) will need runtime check to cast to type (EventSink<dynamic>) → EventSink<dynamic>
-    return new _BoundSinkStream(source, mapSink);
-                                        ^^^^^^^
-warning: line 249, column 44 of dart:async/stream.dart: [DownCastComposite] onListen ((StreamSubscription<T>) → void) will need runtime check to cast to type (StreamSubscription<dynamic>) → void
-    return new _AsBroadcastStream<T>(this, onListen, onCancel);
-                                           ^^^^^^^^
-warning: line 249, column 54 of dart:async/stream.dart: [DownCastComposite] onCancel ((StreamSubscription<T>) → void) will need runtime check to cast to type (StreamSubscription<dynamic>) → void
-    return new _AsBroadcastStream<T>(this, onListen, onCancel);
-                                                     ^^^^^^^^
-warning: line 502, column 24 of dart:async/stream.dart: [DownCastComposite] _cancelAndErrorClosure(subscription, result) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic
-                       _cancelAndErrorClosure(subscription, result));
-                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 535, column 11 of dart:async/stream.dart: [DownCastComposite] _cancelAndErrorClosure(subscription, result) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic
-          _cancelAndErrorClosure(subscription, result)
-          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 603, column 13 of dart:async/stream.dart: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic
-            _cancelAndErrorClosure(subscription, future)
-            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 629, column 13 of dart:async/stream.dart: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic
-            _cancelAndErrorClosure(subscription, future)
-            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 658, column 13 of dart:async/stream.dart: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic
-            _cancelAndErrorClosure(subscription, future)
-            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 695, column 13 of dart:async/stream.dart: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic
-            _cancelAndErrorClosure(subscription, future)
-            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1037, column 11 of dart:async/stream.dart: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic
-          _cancelAndErrorClosure(subscription, future)
-          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1078, column 11 of dart:async/stream.dart: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic
-          _cancelAndErrorClosure(subscription, future)
-          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1130, column 11 of dart:async/stream.dart: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic
-          _cancelAndErrorClosure(subscription, future)
-          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1220, column 43 of dart:async/stream.dart: [DownCastComposite] timeout (Function) will need runtime check to cast to type () → void
-      timer = zone.createTimer(timeLimit, timeout);
-                                          ^^^^^^^
-warning: line 1228, column 43 of dart:async/stream.dart: [DownCastComposite] timeout (Function) will need runtime check to cast to type () → void
-      timer = zone.createTimer(timeLimit, timeout);
-                                          ^^^^^^^
-warning: line 1246, column 21 of dart:async/stream.dart: [DownCastComposite] zone.registerUnaryCallback(onTimeout) ((dynamic) → dynamic) will need runtime check to cast to type (EventSink<dynamic>) → void
-        onTimeout = zone.registerUnaryCallback(onTimeout);
-                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1257, column 43 of dart:async/stream.dart: [DownCastComposite] timeout (Function) will need runtime check to cast to type () → void
-      timer = zone.createTimer(timeLimit, timeout);
-                                          ^^^^^^^
-warning: line 1276, column 53 of dart:async/stream.dart: [DownCastComposite] timeout (Function) will need runtime check to cast to type () → void
-                timer = zone.createTimer(timeLimit, timeout);
-                                                    ^^^^^^^
-warning: line 83, column 14 of dart:async/stream_controller.dart: [DownCastComposite] sync ? new _NoCallbackSyncStreamController() : new _NoCallbackAsyncStreamController() (_StreamController<dynamic>) will need runtime check to cast to type StreamController<T>
-      return sync
-             ^^^^^
-warning: line 516, column 12 of dart:async/stream_controller.dart: [DownCastComposite] subscription (_ControllerSubscription<dynamic>) will need runtime check to cast to type StreamSubscription<T>
-    return subscription;
-           ^^^^^^^^^^^^
-warning: line 798, column 15 of dart:async/stream_controller.dart: [DownCastComposite] controller (_StreamController<dynamic>) will need runtime check to cast to type _EventSink<T>
-      : super(controller, source, cancelOnError) {
-              ^^^^^^^^^^
-warning: line 153, column 42 of dart:async/stream_impl.dart: [DownCastComposite] _nullDataHandler ((dynamic) → void) will need runtime check to cast to type (T) → void
-    if (handleData == null) handleData = _nullDataHandler;
-                                         ^^^^^^^^^^^^^^^^
-warning: line 154, column 15 of dart:async/stream_impl.dart: [DownCastComposite] _zone.registerUnaryCallback(handleData) ((dynamic) → dynamic) will need runtime check to cast to type (T) → void
-    _onData = _zone.registerUnaryCallback(handleData);
-              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 358, column 32 of dart:async/stream_impl.dart: [DownCastImplicit] _onError (Function) will need runtime check to cast to type (dynamic, dynamic) → dynamic
-        _zone.runBinaryGuarded(_onError, error, stackTrace);
-                               ^^^^^^^^
-warning: line 360, column 31 of dart:async/stream_impl.dart: [DownCastImplicit] _onError (Function) will need runtime check to cast to type (dynamic) → dynamic
-        _zone.runUnaryGuarded(_onError, error);
-                              ^^^^^^^^
-warning: line 476, column 12 of dart:async/stream_impl.dart: [DownCastComposite] subscription (StreamSubscription<dynamic>) will need runtime check to cast to type StreamSubscription<T>
-    return subscription;
-           ^^^^^^^^^^^^
-warning: line 515, column 12 of dart:async/stream_impl.dart: [DownCastComposite] new _BufferingStreamSubscription(onData, onError, onDone, cancelOnError).._setPendingEvents(_pending()) (_BufferingStreamSubscription<dynamic>) will need runtime check to cast to type StreamSubscription<T>
-    return new _BufferingStreamSubscription(
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 813, column 28 of dart:async/stream_impl.dart: [DownCastComposite] Zone.current.registerUnaryCallback(onListenHandler) ((dynamic) → dynamic) will need runtime check to cast to type (StreamSubscription<dynamic>) → void
-      : _onListenHandler = Zone.current.registerUnaryCallback(onListenHandler),
-                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 814, column 28 of dart:async/stream_impl.dart: [DownCastComposite] Zone.current.registerUnaryCallback(onCancelHandler) ((dynamic) → dynamic) will need runtime check to cast to type (StreamSubscription<dynamic>) → void
-        _onCancelHandler = Zone.current.registerUnaryCallback(onCancelHandler),
-                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1000, column 14 of dart:async/stream_impl.dart: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type Future<bool>
-      return _futureOrPrefetch;
-             ^^^^^^^^^^^^^^^^^
-warning: line 1006, column 22 of dart:async/stream_impl.dart: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type T
-          _current = _futureOrPrefetch;
-                     ^^^^^^^^^^^^^^^^^
-warning: line 1033, column 31 of dart:async/stream_impl.dart: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type _Future<bool>
-      _Future<bool> hasNext = _futureOrPrefetch;
-                              ^^^^^^^^^^^^^^^^^
-warning: line 1045, column 31 of dart:async/stream_impl.dart: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type _Future<bool>
-      _Future<bool> hasNext = _futureOrPrefetch;
-                              ^^^^^^^^^^^^^^^^^
-warning: line 1059, column 31 of dart:async/stream_impl.dart: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type _Future<bool>
-      _Future<bool> hasNext = _futureOrPrefetch;
-                              ^^^^^^^^^^^^^^^^^
-warning: line 1073, column 31 of dart:async/stream_impl.dart: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type _Future<bool>
-      _Future<bool> hasNext = _futureOrPrefetch;
-                              ^^^^^^^^^^^^^^^^^
-warning: line 104, column 15 of dart:async/stream_pipe.dart: [DownCastComposite] outputData (dynamic) will need runtime check to cast to type T
-    sink._add(outputData);
-              ^^^^^^^^^^
-warning: line 235, column 21 of dart:async/stream_pipe.dart: [DownCastComposite] _transform(inputEvent) (dynamic) will need runtime check to cast to type T
-      outputEvent = _transform(inputEvent);
-                    ^^^^^^^^^^^^^^^^^^^^^^
-warning: line 426, column 29 of dart:async/stream_pipe.dart: [DownCastComposite] _previous (Object) will need runtime check to cast to type T
-          isEqual = _equals(_previous, inputEvent);
-                            ^^^^^^^^^
-warning: line 187, column 18 of dart:async/stream_transformers.dart: [DownCastComposite] _sinkMapper ((EventSink<T>) → EventSink<S>) will need runtime check to cast to type (EventSink<dynamic>) → EventSink<dynamic>
-        _stream, _sinkMapper, onData, onError, onDone, cancelOnError);
-                 ^^^^^^^^^^^
-warning: line 233, column 15 of dart:async/stream_transformers.dart: [UninferredClosure] (EventSink<T> outputSink) {if (handleData == null) handleData = _defaultHandleData; if (handleError == null) handleError = _defaultHandleError; if (handleDone == null) handleDone = _defaultHandleDone; return new _HandlerEventSink<S, T>(handleData, handleError, handleDone, outputSink);} ((EventSink<T>) → dynamic) will need runtime check to cast to type (EventSink<T>) → EventSink<S>
-      : super((EventSink<T> outputSink) {
-              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 234, column 48 of dart:async/stream_transformers.dart: [DownCastComposite] _defaultHandleData ((dynamic, EventSink<dynamic>) → void) will need runtime check to cast to type (S, EventSink<T>) → void
-          if (handleData == null) handleData = _defaultHandleData;
-                                               ^^^^^^^^^^^^^^^^^^
-warning: line 235, column 50 of dart:async/stream_transformers.dart: [DownCastComposite] _defaultHandleError ((dynamic, StackTrace, EventSink<dynamic>) → void) will need runtime check to cast to type (Object, StackTrace, EventSink<T>) → void
-          if (handleError == null) handleError = _defaultHandleError;
-                                                 ^^^^^^^^^^^^^^^^^^^
-warning: line 80, column 19 of dart:async/timer.dart: [DownCastComposite] Zone.current.bindUnaryCallback(callback, runGuarded: true) ((dynamic) → dynamic) will need runtime check to cast to type (Timer) → void
-        duration, Zone.current.bindUnaryCallback(callback, runGuarded: true));
-                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 845, column 57 of dart:async/zone.dart: [DownCastImplicit] implementationZone (Zone) will need runtime check to cast to type _Zone
-    final ZoneDelegate parentDelegate = _parentDelegate(implementationZone);
-                                                        ^^^^^^^^^^^^^^^^^^
-warning: line 962, column 16 of dart:async/zone.dart: [DownCastComposite] zone.bindUnaryCallback(callback) ((dynamic) → dynamic) will need runtime check to cast to type (Timer) → void
-    callback = zone.bindUnaryCallback(callback);
-               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 999, column 26 of dart:async/zone.dart: [DownCastImplicit] zone (Zone) will need runtime check to cast to type _Zone
-  return new _CustomZone(zone, specification, valueMap);
-                         ^^^^
-warning: line 1228, column 37 of dart:async/zone.dart: [DownCastImplicit] onError (Function) will need runtime check to cast to type (dynamic) → dynamic
-        return self.parent.runUnary(onError, error);
-                                    ^^^^^^^
-warning: line 176, column 45 of dart:convert: [DownCastImplicit] key (Object) will need runtime check to cast to type String
-      var result = _getProperty(_processed, key);
-                                            ^^^
-warning: line 177, column 53 of dart:convert: [DownCastImplicit] key (Object) will need runtime check to cast to type String
-      if (_isUnprocessed(result)) result = _process(key);
-                                                    ^^^
-warning: line 233, column 36 of dart:convert: [DownCastImplicit] key (Object) will need runtime check to cast to type String
-    return _hasProperty(_original, key);
-                                   ^^^
-warning: line 311, column 12 of dart:convert: [DownCastComposite] JS('JSExtendableArray', '#', keys) (dynamic) will need runtime check to cast to type List<String>
-    return JS('JSExtendableArray', '#', keys);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 96, column 12 of dart:convert/ascii.dart: [DownCastComposite] result (List<dynamic>) will need runtime check to cast to type List<int>
-    return result;
-           ^^^^^^
-warning: line 109, column 55 of dart:convert/ascii.dart: [DownCastImplicit] sink (Sink<List<int>>) will need runtime check to cast to type ByteConversionSink
-    return new _UnicodeSubsetEncoderSink(_subsetMask, sink);
-                                                      ^^^^
-warning: line 87, column 34 of dart:convert/codec.dart: [DownCastComposite] _first.encoder.fuse(_second.encoder) (Converter<S, dynamic>) will need runtime check to cast to type Converter<S, T>
-  Converter<S, T> get encoder => _first.encoder.fuse(_second.encoder);
-                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 88, column 34 of dart:convert/codec.dart: [DownCastComposite] _second.decoder.fuse(_first.decoder) (Converter<T, dynamic>) will need runtime check to cast to type Converter<T, S>
-  Converter<T, S> get decoder => _second.decoder.fuse(_first.decoder);
-                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 58, column 25 of dart:convert/converter.dart: [DownCastComposite] _second.convert(_first.convert(input)) (dynamic) will need runtime check to cast to type T
-  T convert(S input) => _second.convert(_first.convert(input));
-                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 14, column 12 of dart:convert/encoding.dart: [DownCastComposite] byteStream.transform(decoder).fold(new StringBuffer(), (buffer, string) => buffer..write(string)).then((buffer) => buffer.toString()) (Future<dynamic>) will need runtime check to cast to type Future<String>
-    return byteStream
-           ^^^^^^^^^^^
-warning: line 79, column 38 of dart:convert/html_escape.dart: [DownCastImplicit] sink (Sink<String>) will need runtime check to cast to type StringConversionSink
-    return new _HtmlEscapeSink(this, sink);
-                                     ^^^^
-warning: line 142, column 28 of dart:convert/json.dart: [DownCastComposite] toEncodable ((dynamic) → dynamic) will need runtime check to cast to type (Object) → Object
-    return new JsonEncoder(toEncodable).convert(value);
-                           ^^^^^^^^^^^
-warning: line 147, column 28 of dart:convert/json.dart: [DownCastComposite] _toEncodable ((dynamic) → dynamic) will need runtime check to cast to type (Object) → Object
-    return new JsonEncoder(_toEncodable);
-                           ^^^^^^^^^^^^
-warning: line 243, column 48 of dart:convert/json.dart: [DownCastImplicit] _toEncodable (Function) will need runtime check to cast to type (dynamic) → dynamic
-      _JsonStringStringifier.stringify(object, _toEncodable, indent);
-                                               ^^^^^^^^^^^^
-warning: line 262, column 33 of dart:convert/json.dart: [DownCastImplicit] sink (Sink<String>) will need runtime check to cast to type StringConversionSink
-    return new _JsonEncoderSink(sink, _toEncodable, indent);
-                                ^^^^
-warning: line 270, column 42 of dart:convert/json.dart: [DownCastComposite] _toEncodable (Function) will need runtime check to cast to type (Object) → dynamic
-      return new JsonUtf8Encoder(indent, _toEncodable);
-                                         ^^^^^^^^^^^^
-warning: line 352, column 36 of dart:convert/json.dart: [DownCastComposite] _toEncodable (Function) will need runtime check to cast to type (Object) → dynamic
-                                   _toEncodable,
-                                   ^^^^^^^^^^^^
-warning: line 425, column 51 of dart:convert/json.dart: [DownCastImplicit] _toEncodable (Function) will need runtime check to cast to type (dynamic) → dynamic
-    _JsonStringStringifier.printOn(o, stringSink, _toEncodable, _indent);
-                                                  ^^^^^^^^^^^^
-warning: line 455, column 53 of dart:convert/json.dart: [DownCastComposite] _toEncodable (Function) will need runtime check to cast to type (Object) → dynamic
-    _JsonUtf8Stringifier.stringify(object, _indent, _toEncodable,
-                                                    ^^^^^^^^^^^^
-warning: line 715, column 16 of dart:convert/json.dart: [DownCastComposite] object (dynamic) will need runtime check to cast to type Map<String, Object>
-      writeMap(object);
-               ^^^^^^
-warning: line 817, column 60 of dart:convert/json.dart: [DownCastComposite] _toEncodable (dynamic) will need runtime check to cast to type (Object) → Object
-  _JsonStringStringifier(this._sink, _toEncodable) : super(_toEncodable);
-                                                           ^^^^^^^^^^^^
-warning: line 895, column 15 of dart:convert/json.dart: [DownCastComposite] toEncodable (dynamic) will need runtime check to cast to type (Object) → Object
-        super(toEncodable)
-              ^^^^^^^^^^^
-warning: line 24, column 44 of dart:convert/line_splitter.dart: [DownCastComposite] sink (Sink<dynamic>) will need runtime check to cast to type Sink<String>
-      sink = new StringConversionSink.from(sink);
-                                           ^^^^
-warning: line 26, column 34 of dart:convert/line_splitter.dart: [DownCastImplicit] sink (Sink<dynamic>) will need runtime check to cast to type StringConversionSink
-    return new _LineSplitterSink(sink);
-                                 ^^^^
-warning: line 125, column 33 of dart:convert/utf.dart: [DownCastImplicit] sink (Sink<List<int>>) will need runtime check to cast to type ByteConversionSink
-    return new _Utf8EncoderSink(sink);
-                                ^^^^
-warning: line 206, column 69 of dart:core: [DownCastImplicit] symbol (Symbol) will need runtime check to cast to type Symbol
-String _symbolToString(Symbol symbol) => _symbol_dev.Symbol.getName(symbol);
-                                                                    ^^^^^^
-warning: line 593, column 34 of dart:core/date_time.dart: [DownCastImplicit] Primitives.dateNow() (num) will need runtime check to cast to type int
-        millisecondsSinceEpoch = Primitives.dateNow();
-                                 ^^^^^^^^^^^^^^^^^^^^
-warning: line 258, column 40 of dart:core/duration.dart: [DownCastImplicit] inMinutes.remainder(MINUTES_PER_HOUR) (num) will need runtime check to cast to type int
-    String twoDigitMinutes = twoDigits(inMinutes.remainder(MINUTES_PER_HOUR));
-                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 259, column 40 of dart:core/duration.dart: [DownCastImplicit] inSeconds.remainder(SECONDS_PER_MINUTE) (num) will need runtime check to cast to type int
-    String twoDigitSeconds = twoDigits(inSeconds.remainder(SECONDS_PER_MINUTE));
-                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 261, column 19 of dart:core/duration.dart: [DownCastImplicit] inMicroseconds.remainder(MICROSECONDS_PER_SECOND) (num) will need runtime check to cast to type int
-        sixDigits(inMicroseconds.remainder(MICROSECONDS_PER_SECOND));
-                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 319, column 22 of dart:core/iterable.dart: [DownCastComposite] (generator != null) ? generator : _id (Function) will need runtime check to cast to type (int) → E
-        _generator = (generator != null) ? generator : _id;
-                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 121, column 16 of dart:core/list.dart: [DownCastComposite] e (dynamic) will need runtime check to cast to type E
-      list.add(e);
-               ^
-warning: line 124, column 12 of dart:core/list.dart: [DownCastComposite] makeListFixedLength(list) (List<dynamic>) will need runtime check to cast to type List<E>
-    return makeListFixedLength(list);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 102, column 12 of dart:core/stopwatch.dart: [DownCastImplicit] (_stop == null) ? (_now() - _start) : (_stop - _start) (num) will need runtime check to cast to type int
-    return (_stop == null) ? (_now() - _start) : (_stop - _start);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 753, column 22 of dart:core/string.dart: [DownCastImplicit] _currentCodePoint (num) will need runtime check to cast to type int
-  int get current => _currentCodePoint;
-                     ^^^^^^^^^^^^^^^^^
-warning: line 94, column 12 of dart:core/uri.dart: [DownCastImplicit] _port (num) will need runtime check to cast to type int
-    return _port;
-           ^^^^^
-warning: line 893, column 14 of dart:core/uri.dart: [DownCastImplicit] this._port (num) will need runtime check to cast to type int
-      port = this._port;
-             ^^^^^^^^^^
-warning: line 1131, column 45 of dart:core/uri.dart: [DownCastComposite] _userinfoTable (List<dynamic>) will need runtime check to cast to type List<int>
-    return _normalize(userInfo, start, end, _userinfoTable);
-                                            ^^^^^^^^^^^^^^
-warning: line 1144, column 45 of dart:core/uri.dart: [DownCastComposite] _pathCharOrSlashTable (List<dynamic>) will need runtime check to cast to type List<int>
-      result = _normalize(path, start, end, _pathCharOrSlashTable);
-                                            ^^^^^^^^^^^^^^^^^^^^^
-warning: line 1146, column 51 of dart:core/uri.dart: [DownCastComposite] _pathCharTable (List<dynamic>) will need runtime check to cast to type List<int>
-      result = pathSegments.map((s) => _uriEncode(_pathCharTable, s)).join("/");
-                                                  ^^^^^^^^^^^^^^
-warning: line 1163, column 61 of dart:core/uri.dart: [DownCastComposite] _queryCharTable (List<dynamic>) will need runtime check to cast to type List<int>
-    if (query != null) return _normalize(query, start, end, _queryCharTable);
-                                                            ^^^^^^^^^^^^^^^
-warning: line 1183, column 45 of dart:core/uri.dart: [DownCastComposite] _queryCharTable (List<dynamic>) will need runtime check to cast to type List<int>
-    return _normalize(fragment, start, end, _queryCharTable);
-                                            ^^^^^^^^^^^^^^^
-warning: line 1278, column 37 of dart:core/uri.dart: [DownCastComposite] codeUnits (List<dynamic>) will need runtime check to cast to type Iterable<int>
-    return new String.fromCharCodes(codeUnits);
-                                    ^^^^^^^^^
-warning: line 1494, column 22 of dart:core/uri.dart: [DownCastImplicit] this._port (num) will need runtime check to cast to type int
-        targetPort = this._port;
-                     ^^^^^^^^^^
-warning: line 1754, column 23 of dart:core/uri.dart: [DownCastComposite] _unreserved2396Table (List<dynamic>) will need runtime check to cast to type List<int>
-    return _uriEncode(_unreserved2396Table, component);
-                      ^^^^^^^^^^^^^^^^^^^^
-warning: line 1793, column 9 of dart:core/uri.dart: [DownCastComposite] _unreservedTable (List<dynamic>) will need runtime check to cast to type List<int>
-        _unreservedTable, component, encoding: encoding, spaceToPlus: true);
-        ^^^^^^^^^^^^^^^^
-warning: line 1837, column 23 of dart:core/uri.dart: [DownCastComposite] _encodeFullTable (List<dynamic>) will need runtime check to cast to type List<int>
-    return _uriEncode(_encodeFullTable, uri);
-                      ^^^^^^^^^^^^^^^^
-warning: line 1869, column 12 of dart:core/uri.dart: [DownCastComposite] query.split("&").fold({}, (map, element) {int index = element.indexOf("="); if (index == -1) {if (element != "") {map[decodeQueryComponent(element, encoding: encoding)] = "";}} else if (index != 0) {var key = element.substring(0, index); var value = element.substring(index + 1); map[Uri.decodeQueryComponent(key, encoding: encoding)] = decodeQueryComponent(value, encoding: encoding);} return map;}) (dynamic) will need runtime check to cast to type Map<String, String>
-    return query.split("&").fold({}, (map, element) {
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1901, column 12 of dart:core/uri.dart: [DownCastComposite] bytes.map((byteString) {int byte = int.parse(byteString); if (byte < 0 || byte > 255) {error('each part must be in the range of `0..255`');} return byte;}).toList() (List<dynamic>) will need runtime check to cast to type List<int>
-    return bytes
-           ^^^^^^
-warning: line 2023, column 12 of dart:core/uri.dart: [DownCastComposite] bytes (List<dynamic>) will need runtime check to cast to type List<int>
-    return bytes;
-           ^^^^^
-warning: line 310, column 12 of dart:_internal/iterable.dart: [DownCastComposite] result (List<dynamic>) will need runtime check to cast to type List<E>
-    return result;
-           ^^^^^^
-warning: line 357, column 39 of dart:_internal/iterable.dart: [DownCastComposite] iterable (Iterable<dynamic>) will need runtime check to cast to type Iterable<S>
-    return new MappedIterable<S, T>._(iterable, function);
-                                      ^^^^^^^^
-warning: line 378, column 17 of dart:_internal/iterable.dart: [DownCastComposite] iterable (Iterable<dynamic>) will need runtime check to cast to type Iterable<S>
-      : super._(iterable, function);
-                ^^^^^^^^
-warning: line 454, column 76 of dart:_internal/iterable.dart: [DownCastComposite] _f ((dynamic) → Iterable<dynamic>) will need runtime check to cast to type (S) → Iterable<T>
-  Iterator<T> get iterator => new ExpandIterator<S, T>(_iterable.iterator, _f);
-                                                                           ^^
-warning: line 481, column 29 of dart:_internal/iterable.dart: [DownCastComposite] _f(_iterator.current).iterator (Iterator<dynamic>) will need runtime check to cast to type Iterator<T>
-        _currentExpansion = _f(_iterator.current).iterator;
-                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 961, column 33 of dart:_internal/iterable.dart: [DownCastComposite] iterable (Iterable<dynamic>) will need runtime check to cast to type Iterable<T>
-    return new WhereIterable<T>(iterable, f);
-                                ^^^^^^^^
-warning: line 961, column 43 of dart:_internal/iterable.dart: [DownCastComposite] f ((dynamic) → bool) will need runtime check to cast to type (T) → bool
-    return new WhereIterable<T>(iterable, f);
-                                          ^
-warning: line 978, column 35 of dart:_internal/iterable.dart: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<T>
-    return new SubListIterable<T>(list, 0, n);
-                                  ^^^^
-warning: line 983, column 37 of dart:_internal/iterable.dart: [DownCastComposite] iterable (Iterable<dynamic>) will need runtime check to cast to type Iterable<T>
-    return new TakeWhileIterable<T>(iterable, test);
-                                    ^^^^^^^^
-warning: line 983, column 47 of dart:_internal/iterable.dart: [DownCastComposite] test ((dynamic) → bool) will need runtime check to cast to type (T) → bool
-    return new TakeWhileIterable<T>(iterable, test);
-                                              ^^^^
-warning: line 988, column 35 of dart:_internal/iterable.dart: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<T>
-    return new SubListIterable<T>(list, n, null);
-                                  ^^^^
-warning: line 993, column 37 of dart:_internal/iterable.dart: [DownCastComposite] iterable (Iterable<dynamic>) will need runtime check to cast to type Iterable<T>
-    return new SkipWhileIterable<T>(iterable, test);
-                                    ^^^^^^^^
-warning: line 993, column 47 of dart:_internal/iterable.dart: [DownCastComposite] test ((dynamic) → bool) will need runtime check to cast to type (T) → bool
-    return new SkipWhileIterable<T>(iterable, test);
-                                              ^^^^
-warning: line 997, column 40 of dart:_internal/iterable.dart: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<T>
-    return new ReversedListIterable<T>(list);
-                                       ^^^^
-warning: line 1033, column 35 of dart:_internal/iterable.dart: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<T>
-    return new SubListIterable<T>(list, start, end);
-                                  ^^^^
-warning: line 1115, column 31 of dart:_internal/iterable.dart: [DownCastComposite] l (List<dynamic>) will need runtime check to cast to type List<T>
-    return new ListMapView<T>(l);
-                              ^
-warning: line 251, column 59 of dart:_internal/list.dart: [DownCastImplicit] key (Object) will need runtime check to cast to type int
-  E operator[] (Object key) => containsKey(key) ? _values[key] : null;
-                                                          ^^^
-warning: line 179, column 12 of dart:collection: [DownCastComposite] JS('var', '#.splice(#, 2)[1]', bucket, index) (dynamic) will need runtime check to cast to type V
-    return JS('var', '#.splice(#, 2)[1]', bucket, index);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 193, column 14 of dart:collection: [DownCastComposite] key (dynamic) will need runtime check to cast to type K
-      action(key, this[key]);
-             ^^^
-warning: line 261, column 17 of dart:collection: [DownCastComposite] _getTableEntry(table, key) (dynamic) will need runtime check to cast to type V
-      V value = _getTableEntry(table, key);
-                ^^^^^^^^^^^^^^^^^^^^^^^^^^
-severe: line 372, column 61 of dart:collection: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type K
-      : _validKey = (validKey != null) ? validKey : ((v) => v is K);
-                                                            ^^^^^^
-warning: line 397, column 49 of dart:collection: [DownCastComposite] key (dynamic) will need runtime check to cast to type K
-    return JS('int', '# & 0x3ffffff', _hashCode(key));
-                                                ^^^
-warning: line 404, column 19 of dart:collection: [DownCastComposite] JS('var', '#[#]', bucket, i) (dynamic) will need runtime check to cast to type K
-      if (_equals(JS('var', '#[#]', bucket, i), key)) return i;
-                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 404, column 49 of dart:collection: [DownCastComposite] key (dynamic) will need runtime check to cast to type K
-      if (_equals(JS('var', '#[#]', bucket, i), key)) return i;
-                                                ^^^
-warning: line 430, column 9 of dart:collection: [DownCastComposite] JS('var', '#[#]', keys, i) (dynamic) will need runtime check to cast to type E
-      f(JS('var', '#[#]', keys, i));
-        ^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 456, column 18 of dart:collection: [DownCastComposite] JS('var', '#[#]', keys, offset) (dynamic) will need runtime check to cast to type E
-      _current = JS('var', '#[#]', keys, offset);
-                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 561, column 12 of dart:collection: [DownCastComposite] cell._value (dynamic) will need runtime check to cast to type V
-    return cell._value;
-           ^^^^^^^^^^^
-warning: line 627, column 12 of dart:collection: [DownCastComposite] cell._value (dynamic) will need runtime check to cast to type V
-    return cell._value;
-           ^^^^^^^^^^^
-warning: line 642, column 14 of dart:collection: [DownCastComposite] cell._key (dynamic) will need runtime check to cast to type K
-      action(cell._key, cell._value);
-             ^^^^^^^^^
-warning: line 642, column 25 of dart:collection: [DownCastComposite] cell._value (dynamic) will need runtime check to cast to type V
-      action(cell._key, cell._value);
-                        ^^^^^^^^^^^
-warning: line 665, column 12 of dart:collection: [DownCastComposite] cell._value (dynamic) will need runtime check to cast to type V
-    return cell._value;
-           ^^^^^^^^^^^
-severe: line 795, column 61 of dart:collection: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type K
-      : _validKey = (validKey != null) ? validKey : ((v) => v is K);
-                                                            ^^^^^^
-warning: line 820, column 49 of dart:collection: [DownCastComposite] key (dynamic) will need runtime check to cast to type K
-    return JS('int', '# & 0x3ffffff', _hashCode(key));
-                                                ^^^
-warning: line 828, column 19 of dart:collection: [DownCastComposite] cell._key (dynamic) will need runtime check to cast to type K
-      if (_equals(cell._key, key)) return i;
-                  ^^^^^^^^^
-warning: line 828, column 30 of dart:collection: [DownCastComposite] key (dynamic) will need runtime check to cast to type K
-      if (_equals(cell._key, key)) return i;
-                             ^^^
-warning: line 862, column 9 of dart:collection: [DownCastComposite] cell._key (dynamic) will need runtime check to cast to type E
-      f(cell._key);
-        ^^^^^^^^^
-warning: line 889, column 18 of dart:collection: [DownCastComposite] _cell._key (dynamic) will need runtime check to cast to type E
-      _current = _cell._key;
-                 ^^^^^^^^^^
-warning: line 951, column 14 of dart:collection: [DownCastComposite] this.contains(object) ? object : null (Object) will need runtime check to cast to type E
-      return this.contains(object) ? object : null;
-             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 962, column 12 of dart:collection: [DownCastComposite] bucket[index] (dynamic) will need runtime check to cast to type E
-    return bucket[index];
-           ^^^^^^^^^^^^^
-severe: line 1194, column 61 of dart:collection: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type E
-      : _validKey = (validKey != null) ? validKey : ((x) => x is E);
-                                                            ^^^^^^
-warning: line 1202, column 21 of dart:collection: [DownCastComposite] JS('var', '#[#]', bucket, i) (dynamic) will need runtime check to cast to type E
-      if (_equality(JS('var', '#[#]', bucket, i), element)) return i;
-                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1202, column 51 of dart:collection: [DownCastComposite] element (dynamic) will need runtime check to cast to type E
-      if (_equality(JS('var', '#[#]', bucket, i), element)) return i;
-                                                  ^^^^^^^
-warning: line 1212, column 47 of dart:collection: [DownCastComposite] element (dynamic) will need runtime check to cast to type E
-    return JS('int', '# & 0x3ffffff', _hasher(element));
-                                              ^^^^^^^
-warning: line 1251, column 18 of dart:collection: [DownCastComposite] JS('var', '#[#]', elements, offset) (dynamic) will need runtime check to cast to type E
-      _current = JS('var', '#[#]', elements, offset);
-                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1328, column 14 of dart:collection: [DownCastComposite] this.contains(object) ? object : null (Object) will need runtime check to cast to type E
-      return this.contains(object) ? object : null;
-             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1340, column 12 of dart:collection: [DownCastComposite] bucket[index]._element (dynamic) will need runtime check to cast to type E
-    return bucket[index]._element;
-           ^^^^^^^^^^^^^^^^^^^^^^
-warning: line 1347, column 14 of dart:collection: [DownCastComposite] cell._element (dynamic) will need runtime check to cast to type E
-      action(cell._element);
-             ^^^^^^^^^^^^^
-warning: line 1357, column 12 of dart:collection: [DownCastComposite] _first._element (dynamic) will need runtime check to cast to type E
-    return _first._element;
-           ^^^^^^^^^^^^^^^
-warning: line 1362, column 12 of dart:collection: [DownCastComposite] _last._element (dynamic) will need runtime check to cast to type E
-    return _last._element;
-           ^^^^^^^^^^^^^^
-warning: line 1431, column 19 of dart:collection: [DownCastComposite] cell._element (dynamic) will need runtime check to cast to type E
-      E element = cell._element;
-                  ^^^^^^^^^^^^^
-severe: line 1596, column 61 of dart:collection: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type E
-      : _validKey = (validKey != null) ? validKey : ((x) => x is E);
-                                                            ^^^^^^
-warning: line 1606, column 21 of dart:collection: [DownCastComposite] cell._element (dynamic) will need runtime check to cast to type E
-      if (_equality(cell._element, element)) return i;
-                    ^^^^^^^^^^^^^
-warning: line 1606, column 36 of dart:collection: [DownCastComposite] element (dynamic) will need runtime check to cast to type E
-      if (_equality(cell._element, element)) return i;
-                                   ^^^^^^^
-warning: line 1616, column 47 of dart:collection: [DownCastComposite] element (dynamic) will need runtime check to cast to type E
-    return JS('int', '# & 0x3ffffff', _hasher(element));
-                                              ^^^^^^^
-warning: line 1678, column 18 of dart:collection: [DownCastComposite] _cell._element (dynamic) will need runtime check to cast to type E
-      _current = _cell._element;
-                 ^^^^^^^^^^^^^^
-warning: line 112, column 40 of dart:collection/hash_map.dart: [DownCastComposite] v (dynamic) will need runtime check to cast to type V
-    other.forEach((k, v) { result[k] = v; });
-                                       ^
-warning: line 112, column 35 of dart:collection/hash_map.dart: [DownCastComposite] k (dynamic) will need runtime check to cast to type K
-    other.forEach((k, v) { result[k] = v; });
-                                  ^
-warning: line 128, column 17 of dart:collection/hash_set.dart: [DownCastComposite] elements (Iterable<dynamic>) will need runtime check to cast to type Iterable<E>
-    for (E e in elements) result.add(e);
-                ^^^^^^^^
-warning: line 33, column 16 of dart:collection/iterator.dart: [DownCastComposite] _iterator.current (dynamic) will need runtime check to cast to type E
-    E result = _iterator.current;
-               ^^^^^^^^^^^^^^^^^
-warning: line 99, column 40 of dart:collection/linked_hash_map.dart: [DownCastComposite] v (dynamic) will need runtime check to cast to type V
-    other.forEach((k, v) { result[k] = v; });
-                                       ^
-warning: line 99, column 35 of dart:collection/linked_hash_map.dart: [DownCastComposite] k (dynamic) will need runtime check to cast to type K
-    other.forEach((k, v) { result[k] = v; });
-                                  ^
-warning: line 142, column 12 of dart:collection/linked_hash_map.dart: [DownCastComposite] fillLiteralMap(keyValuePairs, new _LinkedHashMap<K, V>()) (dynamic) will need runtime check to cast to type LinkedHashMap<K, V>
-    return fillLiteralMap(keyValuePairs, new _LinkedHashMap<K, V>());
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 65, column 56 of dart:collection/linked_list.dart: [DownCastComposite] entry (dynamic) will need runtime check to cast to type E
-    entries.forEach((entry) => _insertAfter(_previous, entry));
-                                                       ^^^^^
-warning: line 93, column 17 of dart:collection/linked_list.dart: [DownCastComposite] next (_LinkedListLink) will need runtime check to cast to type E
-      E entry = next;
-                ^^^^
-warning: line 105, column 12 of dart:collection/linked_list.dart: [DownCastComposite] _next (_LinkedListLink) will need runtime check to cast to type E
-    return _next;
-           ^^^^^
-warning: line 112, column 12 of dart:collection/linked_list.dart: [DownCastComposite] _previous (_LinkedListLink) will need runtime check to cast to type E
-    return _previous;
-           ^^^^^^^^^
-warning: line 122, column 12 of dart:collection/linked_list.dart: [DownCastComposite] _next (_LinkedListLink) will need runtime check to cast to type E
-    return _next;
-           ^^^^^
-warning: line 134, column 14 of dart:collection/linked_list.dart: [DownCastComposite] current (_LinkedListLink) will need runtime check to cast to type E
-      action(current);
-             ^^^^^^^
-warning: line 192, column 16 of dart:collection/linked_list.dart: [DownCastComposite] _next (_LinkedListLink) will need runtime check to cast to type E
-    _current = _next;
-               ^^^^^
-warning: line 249, column 16 of dart:collection/linked_list.dart: [DownCastComposite] _next (_LinkedListLink) will need runtime check to cast to type E
-    E result = _next;
-               ^^^^^
-warning: line 365, column 19 of dart:collection/list.dart: [DownCastImplicit] iterable (Iterable<E>) will need runtime check to cast to type List<dynamic>
-      otherList = iterable;
-                  ^^^^^^^^
-warning: line 377, column 27 of dart:collection/list.dart: [DownCastComposite] otherList[otherStart + i] (dynamic) will need runtime check to cast to type E
-        this[start + i] = otherList[otherStart + i];
-                          ^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 381, column 27 of dart:collection/list.dart: [DownCastComposite] otherList[otherStart + i] (dynamic) will need runtime check to cast to type E
-        this[start + i] = otherList[otherStart + i];
-                          ^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 122, column 18 of dart:collection/maps.dart: [DownCastComposite] _map[_map.keys.first] (dynamic) will need runtime check to cast to type V
-  V get first => _map[_map.keys.first];
-                 ^^^^^^^^^^^^^^^^^^^^^
-warning: line 123, column 19 of dart:collection/maps.dart: [DownCastComposite] _map[_map.keys.single] (dynamic) will need runtime check to cast to type V
-  V get single => _map[_map.keys.single];
-                  ^^^^^^^^^^^^^^^^^^^^^^
-warning: line 124, column 17 of dart:collection/maps.dart: [DownCastComposite] _map[_map.keys.last] (dynamic) will need runtime check to cast to type V
-  V get last => _map[_map.keys.last];
-                ^^^^^^^^^^^^^^^^^^^^
-warning: line 144, column 18 of dart:collection/maps.dart: [DownCastComposite] _map[_keys.current] (dynamic) will need runtime check to cast to type V
-      _current = _map[_keys.current];
-                 ^^^^^^^^^^^^^^^^^^^
-warning: line 208, column 23 of dart:collection/queue.dart: [DownCastComposite] elements (Iterable<dynamic>) will need runtime check to cast to type Iterable<E>
-    for (final E e in elements) {
-                      ^^^^^^^^
-warning: line 211, column 12 of dart:collection/queue.dart: [DownCastComposite] list (Queue<E>) will need runtime check to cast to type DoubleLinkedQueue<E>
-    return list;
-           ^^^^
-warning: line 402, column 40 of dart:collection/queue.dart: [DownCastComposite] sourceList (List<dynamic>) will need runtime check to cast to type Iterable<E>
-      queue._table.setRange(0, length, sourceList, 0);
-                                       ^^^^^^^^^^
-warning: line 411, column 31 of dart:collection/queue.dart: [DownCastComposite] elements (Iterable<dynamic>) will need runtime check to cast to type Iterable<E>
-      for (final E element in elements) {
-                              ^^^^^^^^
-warning: line 480, column 52 of dart:collection/queue.dart: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<E>
-        _table.setRange(length, length + addCount, list, 0);
-                                                   ^^^^
-warning: line 486, column 52 of dart:collection/queue.dart: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<E>
-          _table.setRange(_tail, _tail + addCount, list, 0);
-                                                   ^^^^
-warning: line 490, column 52 of dart:collection/queue.dart: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<E>
-          _table.setRange(_tail, _tail + endSpace, list, 0);
-                                                   ^^^^
-warning: line 491, column 40 of dart:collection/queue.dart: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<E>
-          _table.setRange(0, preSpace, list, endSpace);
-                                       ^^^^
-warning: line 738, column 16 of dart:collection/queue.dart: [DownCastComposite] _queue._table[_position] (dynamic) will need runtime check to cast to type E
-    _current = _queue._table[_position];
-               ^^^^^^^^^^^^^^^^^^^^^^^^
-severe: line 610, column 60 of dart:collection/splay_tree.dart: [AnalyzerMessage] The getter '_validKey' is not defined for the class '_SplayTree<K>'
-        new SplayTreeSet<K>(setOrMap._comparator, setOrMap._validKey);
-                                                           ^^^^^^^^^
-severe: line 610, column 38 of dart:collection/splay_tree.dart: [AnalyzerMessage] The getter '_comparator' is not defined for the class '_SplayTree<K>'
-        new SplayTreeSet<K>(setOrMap._comparator, setOrMap._validKey);
-                                     ^^^^^^^^^^^
-warning: line 151, column 12 of dart:collection/splay_tree.dart: [DownCastComposite] current (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeNode<K>
-    return current;
-           ^^^^^^^
-warning: line 167, column 12 of dart:collection/splay_tree.dart: [DownCastComposite] current (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeNode<K>
-    return current;
-           ^^^^^^^
-warning: line 265, column 23 of dart:collection/splay_tree.dart: [DownCastComposite] (compare == null) ? Comparable.compare : compare (Function) will need runtime check to cast to type (K, K) → int
-      : _comparator = (compare == null) ? Comparable.compare : compare,
-                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-severe: line 266, column 65 of dart:collection/splay_tree.dart: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type K
-        _validKey = (isValidKey != null) ? isValidKey : ((v) => v is K);
-                                                                ^^^^^^
-warning: line 275, column 40 of dart:collection/splay_tree.dart: [DownCastComposite] v (dynamic) will need runtime check to cast to type V
-    other.forEach((k, v) { result[k] = v; });
-                                       ^
-warning: line 275, column 35 of dart:collection/splay_tree.dart: [DownCastComposite] k (dynamic) will need runtime check to cast to type K
-    other.forEach((k, v) { result[k] = v; });
-                                  ^
-warning: line 328, column 25 of dart:collection/splay_tree.dart: [DownCastComposite] key (Object) will need runtime check to cast to type K
-      int comp = _splay(key);
-                        ^^^
-warning: line 331, column 16 of dart:collection/splay_tree.dart: [DownCastComposite] mapRoot.value (dynamic) will need runtime check to cast to type V
-        return mapRoot.value;
-               ^^^^^^^^^^^^^
-warning: line 339, column 41 of dart:collection/splay_tree.dart: [DownCastComposite] key (Object) will need runtime check to cast to type K
-    _SplayTreeMapNode mapRoot = _remove(key);
-                                        ^^^
-warning: line 340, column 33 of dart:collection/splay_tree.dart: [DownCastComposite] mapRoot.value (dynamic) will need runtime check to cast to type V
-    if (mapRoot != null) return mapRoot.value;
-                                ^^^^^^^^^^^^^
-warning: line 363, column 14 of dart:collection/splay_tree.dart: [DownCastComposite] mapRoot.value (dynamic) will need runtime check to cast to type V
-      return mapRoot.value;
-             ^^^^^^^^^^^^^
-warning: line 394, column 38 of dart:collection/splay_tree.dart: [DownCastComposite] nodes.current (_SplayTreeNode<K>) will need runtime check to cast to type _SplayTreeMapNode<K, V>
-      _SplayTreeMapNode<K, V> node = nodes.current;
-                                     ^^^^^^^^^^^^^
-warning: line 408, column 37 of dart:collection/splay_tree.dart: [DownCastComposite] key (Object) will need runtime check to cast to type K
-    return _validKey(key) && _splay(key) == 0;
-                                    ^^^
-warning: line 420, column 41 of dart:collection/splay_tree.dart: [DownCastImplicit] node.right (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeMapNode<dynamic, dynamic>
-        if (node.right != null && visit(node.right)) return true;
-                                        ^^^^^^^^^^
-warning: line 421, column 16 of dart:collection/splay_tree.dart: [DownCastImplicit] node.left (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeMapNode<dynamic, dynamic>
-        node = node.left;
-               ^^^^^^^^^
-warning: line 425, column 18 of dart:collection/splay_tree.dart: [DownCastImplicit] _root (_SplayTreeNode<K>) will need runtime check to cast to type _SplayTreeMapNode<dynamic, dynamic>
-    return visit(_root);
-                 ^^^^^
-warning: line 441, column 12 of dart:collection/splay_tree.dart: [DownCastComposite] _first.key (dynamic) will need runtime check to cast to type K
-    return _first.key;
-           ^^^^^^^^^^
-warning: line 449, column 12 of dart:collection/splay_tree.dart: [DownCastComposite] _last.key (dynamic) will need runtime check to cast to type K
-    return _last.key;
-           ^^^^^^^^^
-warning: line 545, column 22 of dart:collection/splay_tree.dart: [DownCastImplicit] _currentNode (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeMapNode<dynamic, dynamic>
-    return _getValue(_currentNode);
-                     ^^^^^^^^^^^^
-warning: line 610, column 29 of dart:collection/splay_tree.dart: [DownCastComposite] setOrMap._comparator (dynamic) will need runtime check to cast to type (K, K) → int
-        new SplayTreeSet<K>(setOrMap._comparator, setOrMap._validKey);
-                            ^^^^^^^^^^^^^^^^^^^^
-warning: line 610, column 51 of dart:collection/splay_tree.dart: [DownCastComposite] setOrMap._validKey (dynamic) will need runtime check to cast to type (Object) → bool
-        new SplayTreeSet<K>(setOrMap._comparator, setOrMap._validKey);
-                                                  ^^^^^^^^^^^^^^^^^^
-warning: line 628, column 39 of dart:collection/splay_tree.dart: [DownCastComposite] node.key (dynamic) will need runtime check to cast to type K
-  K _getValue(_SplayTreeNode node) => node.key;
-                                      ^^^^^^^^
-warning: line 633, column 42 of dart:collection/splay_tree.dart: [DownCastComposite] node.value (dynamic) will need runtime check to cast to type V
-  V _getValue(_SplayTreeMapNode node) => node.value;
-                                         ^^^^^^^^^^
-warning: line 641, column 55 of dart:collection/splay_tree.dart: [DownCastComposite] node (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeNode<K>
-  _SplayTreeNode<K> _getValue(_SplayTreeNode node) => node;
-                                                      ^^^^
-warning: line 691, column 23 of dart:collection/splay_tree.dart: [DownCastComposite] (compare == null) ? Comparable.compare : compare (Function) will need runtime check to cast to type (E, E) → int
-      : _comparator = (compare == null) ? Comparable.compare : compare,
-                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-severe: line 692, column 65 of dart:collection/splay_tree.dart: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type E
-        _validKey = (isValidKey != null) ? isValidKey : ((v) => v is E);
-                                                                ^^^^^^
-warning: line 705, column 29 of dart:collection/splay_tree.dart: [DownCastComposite] elements (Iterable<dynamic>) will need runtime check to cast to type Iterable<E>
-    for (final E element in elements) {
-                            ^^^^^^^^
-warning: line 723, column 12 of dart:collection/splay_tree.dart: [DownCastComposite] _first.key (dynamic) will need runtime check to cast to type E
-    return _first.key;
-           ^^^^^^^^^^
-warning: line 728, column 12 of dart:collection/splay_tree.dart: [DownCastComposite] _last.key (dynamic) will need runtime check to cast to type E
-    return _last.key;
-           ^^^^^^^^^
-warning: line 739, column 40 of dart:collection/splay_tree.dart: [DownCastComposite] object (Object) will need runtime check to cast to type E
-    return _validKey(object) && _splay(object) == 0;
-                                       ^^^^^^
-warning: line 751, column 20 of dart:collection/splay_tree.dart: [DownCastComposite] object (Object) will need runtime check to cast to type E
-    return _remove(object) != null;
-                   ^^^^^^
-warning: line 765, column 39 of dart:collection/splay_tree.dart: [DownCastComposite] element (Object) will need runtime check to cast to type E
-      if (_validKey(element)) _remove(element);
-                                      ^^^^^^^
-warning: line 779, column 39 of dart:collection/splay_tree.dart: [DownCastComposite] object (Object) will need runtime check to cast to type E
-      if (_validKey(object) && _splay(object) == 0) retainSet.add(_root.key);
-                                      ^^^^^^
-warning: line 791, column 23 of dart:collection/splay_tree.dart: [DownCastComposite] object (Object) will need runtime check to cast to type E
-    int comp = _splay(object);
-                      ^^^^^^
-warning: line 87, column 18 of dart:_js_helper: [DownCastImplicit] JS('num', r'parseInt(#, 16)', source) (num) will need runtime check to cast to type int
-          return JS('num', r'parseInt(#, 16)', source);
-                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 91, column 18 of dart:_js_helper: [DownCastImplicit] JS('num', r'parseInt(#, 10)', source) (num) will need runtime check to cast to type int
-          return JS('num', r'parseInt(#, 10)', source);
-                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 103, column 18 of dart:_js_helper: [DownCastImplicit] JS('num', r'parseInt(#, 10)', source) (num) will need runtime check to cast to type int
-          return JS('num', r'parseInt(#, 10)', source);
-                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 135, column 12 of dart:_js_helper: [DownCastImplicit] JS('num', r'parseInt(#, #)', source, radix) (num) will need runtime check to cast to type int
-    return JS('num', r'parseInt(#, #)', source, radix);
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 159, column 16 of dart:_js_helper: [DownCastImplicit] result (num) will need runtime check to cast to type double
-        return result;
-               ^^^^^^
-warning: line 163, column 12 of dart:_js_helper: [DownCastImplicit] result (num) will need runtime check to cast to type double
-    return result;
-           ^^^^^^
-warning: line 250, column 15 of dart:_js_helper: [DownCastImplicit] 0xd800 + ((((i - 0x10000) >> 10) & 0x3ff)) (num) will need runtime check to cast to type int
-        a.add(0xd800 + ((((i - 0x10000) >> 10) & 0x3ff)));
-              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 251, column 15 of dart:_js_helper: [DownCastImplicit] 0xdc00 + (i & 0x3ff) (num) will need runtime check to cast to type int
-        a.add(0xdc00 + (i & 0x3ff));
-              ^^^^^^^^^^^^^^^^^^^^
-warning: line 265, column 31 of dart:_js_helper: [DownCastComposite] charCodes (dynamic) will need runtime check to cast to type List<int>
-    return _fromCharCodeApply(charCodes);
-                              ^^^^^^^^^
-warning: line 108, column 22 of dart:_js_helper/regexp_helper.dart: [DownCastComposite] JS('JSExtendableArray|Null', r'#.exec(#)', _nativeRegExp, checkString(string)) (dynamic) will need runtime check to cast to type List<String>
-    List<String> m = JS('JSExtendableArray|Null',
-                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 140, column 43 of dart:_js_helper/regexp_helper.dart: [DownCastComposite] match (List<dynamic>) will need runtime check to cast to type List<String>
-    return new _MatchImplementation(this, match);
-                                          ^^^^^
-warning: line 152, column 43 of dart:_js_helper/regexp_helper.dart: [DownCastComposite] match (List<dynamic>) will need runtime check to cast to type List<String>
-    return new _MatchImplementation(this, match);
-                                          ^^^^^
-warning: line 137, column 23 of dart:_js_helper/string_helper.dart: [DownCastComposite] pattern.allMatches(receiver) (dynamic) will need runtime check to cast to type Iterable<Match>
-  for (Match match in pattern.allMatches(receiver)) {
-                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 325, column 44 of dart:js: [DownCastComposite] _convertToJS ((dynamic) → dynamic) will need runtime check to cast to type (E) → dynamic
-      : super._fromJs([]..addAll(other.map(_convertToJS)));
-                                           ^^^^^^^^^^^^
-warning: line 358, column 12 of dart:js: [DownCastComposite] super[index] (dynamic) will need runtime check to cast to type E
-    return super[index];
-           ^^^^^^^^^^^^
-warning: line 394, column 24 of dart:js: [DownCastImplicit] list (Object) will need runtime check to cast to type List<dynamic>
-    callMethod('push', list);
-                       ^^^^
-warning: line 404, column 12 of dart:js: [DownCastComposite] callMethod('splice', [index, 1])[0] (dynamic) will need runtime check to cast to type E
-    return callMethod('splice', [index, 1])[0];
-           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-warning: line 409, column 12 of dart:js: [DownCastComposite] callMethod('pop') (dynamic) will need runtime check to cast to type E
-    return callMethod('pop');
-           ^^^^^^^^^^^^^^^^^
-warning: line 486, column 52 of dart:js: [DownCastImplicit] ms (num) will need runtime check to cast to type int
-    return new DateTime.fromMillisecondsSinceEpoch(ms);
-                                                   ^^
-severe: line 120, column 7 of dart:_js_mirrors: [AnalyzerMessage] Missing concrete implementation of getter 'TypeMirror.typeArguments', getter 'TypeMirror.isOriginalDeclaration', getter 'DeclarationMirror.owner', getter 'DeclarationMirror.location' and 10 more
-class JsTypeMirror implements TypeMirror {
-      ^^^^^^^^^^^^
-severe: line 47, column 7 of dart:_js_mirrors: [AnalyzerMessage] Missing concrete implementation of getter 'InstanceMirror.type', getter 'InstanceMirror.hasReflectee' and 'InstanceMirror.delegate'
-class JsInstanceMirror implements InstanceMirror {
-      ^^^^^^^^^^^^^^^^
-severe: line 126, column 7 of dart:_js_mirrors: [AnalyzerMessage] Missing concrete implementation of getter 'VariableMirror.isStatic', getter 'VariableMirror.isFinal', getter 'DeclarationMirror.owner', getter 'ParameterMirror.isOptional' and 9 more
-class JsParameterMirror implements ParameterMirror {
-      ^^^^^^^^^^^^^^^^^
-severe: line 84, column 7 of dart:_js_mirrors: [AnalyzerMessage] Missing concrete implementation of getter 'TypeMirror.typeArguments', getter 'ClassMirror.superinterfaces', getter 'TypeMirror.isOriginalDeclaration', getter 'ClassMirror.staticMembers' and 19 more
-class JsClassMirror implements ClassMirror {
-      ^^^^^^^^^^^^^
-severe: line 134, column 7 of dart:_js_mirrors: [AnalyzerMessage] Missing concrete implementation of getter 'MethodMirror.isSetter', getter 'MethodMirror.isConstructor', getter 'MethodMirror.isConstConstructor', getter 'MethodMirror.isAbstract' and 17 more
-class JsMethodMirror implements MethodMirror {
-      ^^^^^^^^^^^^^^
-severe: line 61, column 35 of dart:_js_mirrors: [AnalyzerMessage] The argument type 'void' cannot be assigned to the parameter type 'Object'
-    return new JsInstanceMirror._(field);
-                                  ^^^^^
-warning: line 171, column 10 of dart:mirrors: [DownCastImplicit] (tm as ClassMirror).originalDeclaration (TypeMirror) will need runtime check to cast to type ClassMirror
-  return (tm as ClassMirror).originalDeclaration;
-         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+warning: [DownCastImplicit] rnd32.remainder(max) (num) will need runtime check to cast to type int (dart:math, line 426, col 16)
+warning: [DownCastComposite] x + other.x (num) will need runtime check to cast to type T (dart:math/point.dart, line 37, col 25)
+warning: [DownCastComposite] y + other.y (num) will need runtime check to cast to type T (dart:math/point.dart, line 37, col 38)
+warning: [DownCastComposite] x - other.x (num) will need runtime check to cast to type T (dart:math/point.dart, line 46, col 25)
+warning: [DownCastComposite] y - other.y (num) will need runtime check to cast to type T (dart:math/point.dart, line 46, col 38)
+warning: [DownCastComposite] x * factor (num) will need runtime check to cast to type T (dart:math/point.dart, line 59, col 25)
+warning: [DownCastComposite] y * factor (num) will need runtime check to cast to type T (dart:math/point.dart, line 59, col 37)
+warning: [DownCastComposite] dx * dx + dy * dy (num) will need runtime check to cast to type T (dart:math/point.dart, line 86, col 12)
+warning: [DownCastComposite] left + width (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 33, col 18)
+warning: [DownCastComposite] top + height (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 35, col 19)
+warning: [DownCastComposite] x0 (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 68, col 33)
+warning: [DownCastComposite] y0 (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 68, col 37)
+warning: [DownCastComposite] x1 - x0 (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 68, col 41)
+warning: [DownCastComposite] y1 - y0 (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 68, col 50)
+warning: [DownCastComposite] left (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 95, col 29)
+warning: [DownCastComposite] top (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 95, col 35)
+warning: [DownCastComposite] right - left (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 95, col 40)
+warning: [DownCastComposite] bottom - top (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 95, col 54)
+warning: [DownCastComposite] this.left + this.width (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 119, col 41)
+warning: [DownCastComposite] this.left + this.width (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 120, col 44)
+warning: [DownCastComposite] this.top + this.height (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 121, col 7)
+warning: [DownCastComposite] this.top + this.height (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 123, col 7)
+warning: [DownCastComposite] (width < 0) ? -width * 0 : width (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 151, col 22)
+warning: [DownCastComposite] (height < 0) ? -height * 0 : height (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 152, col 23)
+warning: [DownCastComposite] min(a.x, b.x) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 167, col 14)
+warning: [DownCastComposite] max(a.x, b.x) - left (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 168, col 15)
+warning: [DownCastComposite] min(a.y, b.y) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 169, col 13)
+warning: [DownCastComposite] max(a.y, b.y) - top (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 170, col 16)
+warning: [DownCastComposite] (width < 0) ? _clampToZero(width) : width (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 212, col 23)
+warning: [DownCastComposite] (height < 0) ? _clampToZero(height) : height (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 213, col 24)
+warning: [DownCastComposite] min(a.x, b.x) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 228, col 14)
+warning: [DownCastComposite] max(a.x, b.x) - left (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 229, col 15)
+warning: [DownCastComposite] min(a.y, b.y) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 230, col 13)
+warning: [DownCastComposite] max(a.y, b.y) - top (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 231, col 16)
+warning: [DownCastComposite] _clampToZero(width) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 247, col 28)
+warning: [DownCastComposite] _clampToZero(height) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 263, col 30)
+severe: [AnalyzerMessage] Classes cannot implement 'bool' (dart:_interceptors, line 29, col 45)
+warning: [DownCastComposite] JS('var', r'#.pop()', this) (dynamic) will need runtime check to cast to type E (dart:_interceptors/js_array.dart, line 80, col 12)
+warning: [DownCastComposite] JS('', '#[#]', this, i) (dynamic) will need runtime check to cast to type E (dart:_interceptors/js_array.dart, line 125, col 9)
+warning: [DownCastComposite] IterableMixinWorkaround.reduce(this, combine) (dynamic) will need runtime check to cast to type E (dart:_interceptors/js_array.dart, line 161, col 12)
+warning: [DownCastComposite] IterableMixinWorkaround.firstWhere(this, test, orElse) (dynamic) will need runtime check to cast to type E (dart:_interceptors/js_array.dart, line 169, col 12)
+warning: [DownCastComposite] IterableMixinWorkaround.lastWhereList(this, test, orElse) (dynamic) will need runtime check to cast to type E (dart:_interceptors/js_array.dart, line 173, col 12)
+warning: [DownCastComposite] IterableMixinWorkaround.singleWhere(this, test) (dynamic) will need runtime check to cast to type E (dart:_interceptors/js_array.dart, line 177, col 12)
+warning: [DownCastComposite] JS('var', '#[#]', this, index) (dynamic) will need runtime check to cast to type E (dart:_interceptors/js_array.dart, line 313, col 12)
+severe: [AnalyzerMessage] Classes cannot implement 'double' (dart:_interceptors/js_number.dart, line 349, col 46)
+severe: [AnalyzerMessage] The return type 'JSNumber' is not a 'double', as defined by the method 'toDouble' (dart:_interceptors/js_number.dart, line 110, col 17)
+severe: [AnalyzerMessage] Classes cannot implement 'int' (dart:_interceptors/js_number.dart, line 349, col 41)
+severe: [AnalyzerMessage] Classes cannot implement 'num' (dart:_interceptors/js_number.dart, line 16, col 47)
+severe: [AnalyzerMessage] Classes cannot implement 'double' (dart:_interceptors/js_number.dart, line 420, col 44)
+warning: [DownCastImplicit] JS('num', r'Math.ceil(#)', this) (num) will need runtime check to cast to type double (dart:_interceptors/js_number.dart, line 83, col 28)
+warning: [DownCastImplicit] JS('num', r'Math.floor(#)', this) (num) will need runtime check to cast to type double (dart:_interceptors/js_number.dart, line 85, col 29)
+warning: [DownCastImplicit] JS('num', r'-Math.round(-#)', this) (num) will need runtime check to cast to type double (dart:_interceptors/js_number.dart, line 89, col 14)
+warning: [DownCastImplicit] JS('num', r'Math.round(#)', this) (num) will need runtime check to cast to type double (dart:_interceptors/js_number.dart, line 91, col 14)
+severe: [StaticTypeError] Type check failed: this (JSNumber) is not of type double (dart:_interceptors/js_number.dart, line 110, col 17)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.abs (() → num) is not a subtype of int.abs (() → int). (dart:_interceptors/js_number.dart, line 349, col 13)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.unary- (() → num) is not a subtype of int.unary- (() → int). (dart:_interceptors/js_number.dart, line 349, col 13)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.<< ((num) → num) is not a subtype of int.<< ((int) → int). (dart:_interceptors/js_number.dart, line 349, col 13)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.>> ((num) → num) is not a subtype of int.>> ((int) → int). (dart:_interceptors/js_number.dart, line 349, col 13)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.& ((num) → num) is not a subtype of int.& ((int) → int). (dart:_interceptors/js_number.dart, line 349, col 13)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.| ((num) → num) is not a subtype of int.| ((int) → int). (dart:_interceptors/js_number.dart, line 349, col 13)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.^ ((num) → num) is not a subtype of int.^ ((int) → int). (dart:_interceptors/js_number.dart, line 349, col 13)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.sign (() → num) is not a subtype of int.sign (() → int). (dart:_interceptors/js_number.dart, line 349, col 13)
+warning: [DownCastImplicit] this & ((1 << width) - 1) (num) will need runtime check to cast to type int (dart:_interceptors/js_number.dart, line 357, col 12)
+warning: [DownCastImplicit] (this & (signMask - 1)) - (this & signMask) (num) will need runtime check to cast to type int (dart:_interceptors/js_number.dart, line 362, col 12)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.remainder ((num) → num) is not a subtype of double.remainder ((num) → double). (dart:_interceptors/js_number.dart, line 420, col 16)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.abs (() → num) is not a subtype of double.abs (() → double). (dart:_interceptors/js_number.dart, line 420, col 16)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.unary- (() → num) is not a subtype of double.unary- (() → double). (dart:_interceptors/js_number.dart, line 420, col 16)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.+ ((num) → num) is not a subtype of double.+ ((num) → double). (dart:_interceptors/js_number.dart, line 420, col 16)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.- ((num) → num) is not a subtype of double.- ((num) → double). (dart:_interceptors/js_number.dart, line 420, col 16)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.* ((num) → num) is not a subtype of double.* ((num) → double). (dart:_interceptors/js_number.dart, line 420, col 16)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.% ((num) → num) is not a subtype of double.% ((num) → double). (dart:_interceptors/js_number.dart, line 420, col 16)
+severe: [InvalidMethodOverride] Base class introduces an invalid override. The type of JSNumber.sign (() → num) is not a subtype of double.sign (() → double). (dart:_interceptors/js_number.dart, line 420, col 16)
+severe: [AnalyzerMessage] Classes cannot implement 'String' (dart:_interceptors/js_string.dart, line 14, col 47)
+warning: [DownCastComposite] JS('JSExtendableArray', r'#.split(#)', this, pattern) (dynamic) will need runtime check to cast to type List<String> (dart:_interceptors/js_string.dart, line 86, col 14)
+warning: [DownCastComposite] JS('JSExtendableArray', r'#.split(#)', this, re) (dynamic) will need runtime check to cast to type List<String> (dart:_interceptors/js_string.dart, line 89, col 14)
+severe: [StaticTypeError] Type check failed: s += s (String) is not of type JSString (dart:_interceptors/js_string.dart, line 346, col 7)
+warning: [DownCastComposite] result (List<dynamic>) will need runtime check to cast to type List<E> (dart:_internal/iterable.dart, line 310, col 12)
+warning: [DownCastComposite] iterable (Iterable<dynamic>) will need runtime check to cast to type Iterable<S> (dart:_internal/iterable.dart, line 357, col 39)
+warning: [DownCastComposite] iterable (Iterable<dynamic>) will need runtime check to cast to type Iterable<S> (dart:_internal/iterable.dart, line 378, col 17)
+warning: [DownCastComposite] _f ((dynamic) → Iterable<dynamic>) will need runtime check to cast to type (S) → Iterable<T> (dart:_internal/iterable.dart, line 454, col 76)
+warning: [DownCastComposite] _f(_iterator.current).iterator (Iterator<dynamic>) will need runtime check to cast to type Iterator<T> (dart:_internal/iterable.dart, line 481, col 29)
+warning: [DownCastComposite] iterable (Iterable<dynamic>) will need runtime check to cast to type Iterable<T> (dart:_internal/iterable.dart, line 961, col 33)
+warning: [DownCastComposite] f ((dynamic) → bool) will need runtime check to cast to type (T) → bool (dart:_internal/iterable.dart, line 961, col 43)
+warning: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<T> (dart:_internal/iterable.dart, line 978, col 35)
+warning: [DownCastComposite] iterable (Iterable<dynamic>) will need runtime check to cast to type Iterable<T> (dart:_internal/iterable.dart, line 983, col 37)
+warning: [DownCastComposite] test ((dynamic) → bool) will need runtime check to cast to type (T) → bool (dart:_internal/iterable.dart, line 983, col 47)
+warning: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<T> (dart:_internal/iterable.dart, line 988, col 35)
+warning: [DownCastComposite] iterable (Iterable<dynamic>) will need runtime check to cast to type Iterable<T> (dart:_internal/iterable.dart, line 993, col 37)
+warning: [DownCastComposite] test ((dynamic) → bool) will need runtime check to cast to type (T) → bool (dart:_internal/iterable.dart, line 993, col 47)
+warning: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<T> (dart:_internal/iterable.dart, line 997, col 40)
+warning: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<T> (dart:_internal/iterable.dart, line 1033, col 35)
+warning: [DownCastComposite] l (List<dynamic>) will need runtime check to cast to type List<T> (dart:_internal/iterable.dart, line 1115, col 31)
+warning: [DownCastImplicit] key (Object) will need runtime check to cast to type int (dart:_internal/list.dart, line 251, col 59)
+warning: [DownCastComposite] JS('var', '#.splice(#, 2)[1]', bucket, index) (dynamic) will need runtime check to cast to type V (dart:collection, line 179, col 12)
+warning: [DownCastComposite] key (dynamic) will need runtime check to cast to type K (dart:collection, line 193, col 14)
+warning: [DownCastComposite] _getTableEntry(table, key) (dynamic) will need runtime check to cast to type V (dart:collection, line 261, col 17)
+severe: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type K (dart:collection, line 372, col 61)
+warning: [DownCastComposite] key (dynamic) will need runtime check to cast to type K (dart:collection, line 397, col 49)
+warning: [DownCastComposite] JS('var', '#[#]', bucket, i) (dynamic) will need runtime check to cast to type K (dart:collection, line 404, col 19)
+warning: [DownCastComposite] key (dynamic) will need runtime check to cast to type K (dart:collection, line 404, col 49)
+warning: [DownCastComposite] JS('var', '#[#]', keys, i) (dynamic) will need runtime check to cast to type E (dart:collection, line 430, col 9)
+warning: [DownCastComposite] JS('var', '#[#]', keys, offset) (dynamic) will need runtime check to cast to type E (dart:collection, line 456, col 18)
+warning: [DownCastComposite] cell._value (dynamic) will need runtime check to cast to type V (dart:collection, line 561, col 12)
+warning: [DownCastComposite] cell._value (dynamic) will need runtime check to cast to type V (dart:collection, line 627, col 12)
+warning: [DownCastComposite] cell._key (dynamic) will need runtime check to cast to type K (dart:collection, line 642, col 14)
+warning: [DownCastComposite] cell._value (dynamic) will need runtime check to cast to type V (dart:collection, line 642, col 25)
+warning: [DownCastComposite] cell._value (dynamic) will need runtime check to cast to type V (dart:collection, line 665, col 12)
+severe: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type K (dart:collection, line 795, col 61)
+warning: [DownCastComposite] key (dynamic) will need runtime check to cast to type K (dart:collection, line 820, col 49)
+warning: [DownCastComposite] cell._key (dynamic) will need runtime check to cast to type K (dart:collection, line 828, col 19)
+warning: [DownCastComposite] key (dynamic) will need runtime check to cast to type K (dart:collection, line 828, col 30)
+warning: [DownCastComposite] cell._key (dynamic) will need runtime check to cast to type E (dart:collection, line 862, col 9)
+warning: [DownCastComposite] _cell._key (dynamic) will need runtime check to cast to type E (dart:collection, line 889, col 18)
+warning: [DownCastComposite] this.contains(object) ? object : null (Object) will need runtime check to cast to type E (dart:collection, line 951, col 14)
+warning: [DownCastComposite] bucket[index] (dynamic) will need runtime check to cast to type E (dart:collection, line 962, col 12)
+severe: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type E (dart:collection, line 1194, col 61)
+warning: [DownCastComposite] JS('var', '#[#]', bucket, i) (dynamic) will need runtime check to cast to type E (dart:collection, line 1202, col 21)
+warning: [DownCastComposite] element (dynamic) will need runtime check to cast to type E (dart:collection, line 1202, col 51)
+warning: [DownCastComposite] element (dynamic) will need runtime check to cast to type E (dart:collection, line 1212, col 47)
+warning: [DownCastComposite] JS('var', '#[#]', elements, offset) (dynamic) will need runtime check to cast to type E (dart:collection, line 1251, col 18)
+warning: [DownCastComposite] this.contains(object) ? object : null (Object) will need runtime check to cast to type E (dart:collection, line 1328, col 14)
+warning: [DownCastComposite] bucket[index]._element (dynamic) will need runtime check to cast to type E (dart:collection, line 1340, col 12)
+warning: [DownCastComposite] cell._element (dynamic) will need runtime check to cast to type E (dart:collection, line 1347, col 14)
+warning: [DownCastComposite] _first._element (dynamic) will need runtime check to cast to type E (dart:collection, line 1357, col 12)
+warning: [DownCastComposite] _last._element (dynamic) will need runtime check to cast to type E (dart:collection, line 1362, col 12)
+warning: [DownCastComposite] cell._element (dynamic) will need runtime check to cast to type E (dart:collection, line 1431, col 19)
+severe: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type E (dart:collection, line 1596, col 61)
+warning: [DownCastComposite] cell._element (dynamic) will need runtime check to cast to type E (dart:collection, line 1606, col 21)
+warning: [DownCastComposite] element (dynamic) will need runtime check to cast to type E (dart:collection, line 1606, col 36)
+warning: [DownCastComposite] element (dynamic) will need runtime check to cast to type E (dart:collection, line 1616, col 47)
+warning: [DownCastComposite] _cell._element (dynamic) will need runtime check to cast to type E (dart:collection, line 1678, col 18)
+warning: [DownCastComposite] v (dynamic) will need runtime check to cast to type V (dart:collection/hash_map.dart, line 112, col 40)
+warning: [DownCastComposite] k (dynamic) will need runtime check to cast to type K (dart:collection/hash_map.dart, line 112, col 35)
+warning: [DownCastComposite] elements (Iterable<dynamic>) will need runtime check to cast to type Iterable<E> (dart:collection/hash_set.dart, line 128, col 17)
+warning: [DownCastComposite] _iterator.current (dynamic) will need runtime check to cast to type E (dart:collection/iterator.dart, line 33, col 16)
+warning: [DownCastComposite] v (dynamic) will need runtime check to cast to type V (dart:collection/linked_hash_map.dart, line 99, col 40)
+warning: [DownCastComposite] k (dynamic) will need runtime check to cast to type K (dart:collection/linked_hash_map.dart, line 99, col 35)
+warning: [DownCastComposite] fillLiteralMap(keyValuePairs, new _LinkedHashMap<K, V>()) (dynamic) will need runtime check to cast to type LinkedHashMap<K, V> (dart:collection/linked_hash_map.dart, line 142, col 12)
+warning: [DownCastComposite] entry (dynamic) will need runtime check to cast to type E (dart:collection/linked_list.dart, line 65, col 56)
+warning: [DownCastComposite] next (_LinkedListLink) will need runtime check to cast to type E (dart:collection/linked_list.dart, line 93, col 17)
+warning: [DownCastComposite] _next (_LinkedListLink) will need runtime check to cast to type E (dart:collection/linked_list.dart, line 105, col 12)
+warning: [DownCastComposite] _previous (_LinkedListLink) will need runtime check to cast to type E (dart:collection/linked_list.dart, line 112, col 12)
+warning: [DownCastComposite] _next (_LinkedListLink) will need runtime check to cast to type E (dart:collection/linked_list.dart, line 122, col 12)
+warning: [DownCastComposite] current (_LinkedListLink) will need runtime check to cast to type E (dart:collection/linked_list.dart, line 134, col 14)
+warning: [DownCastComposite] _next (_LinkedListLink) will need runtime check to cast to type E (dart:collection/linked_list.dart, line 192, col 16)
+warning: [DownCastComposite] _next (_LinkedListLink) will need runtime check to cast to type E (dart:collection/linked_list.dart, line 249, col 16)
+warning: [DownCastImplicit] iterable (Iterable<E>) will need runtime check to cast to type List<dynamic> (dart:collection/list.dart, line 365, col 19)
+warning: [DownCastComposite] otherList[otherStart + i] (dynamic) will need runtime check to cast to type E (dart:collection/list.dart, line 377, col 27)
+warning: [DownCastComposite] otherList[otherStart + i] (dynamic) will need runtime check to cast to type E (dart:collection/list.dart, line 381, col 27)
+warning: [DownCastComposite] _map[_map.keys.first] (dynamic) will need runtime check to cast to type V (dart:collection/maps.dart, line 122, col 18)
+warning: [DownCastComposite] _map[_map.keys.single] (dynamic) will need runtime check to cast to type V (dart:collection/maps.dart, line 123, col 19)
+warning: [DownCastComposite] _map[_map.keys.last] (dynamic) will need runtime check to cast to type V (dart:collection/maps.dart, line 124, col 17)
+warning: [DownCastComposite] _map[_keys.current] (dynamic) will need runtime check to cast to type V (dart:collection/maps.dart, line 144, col 18)
+warning: [DownCastComposite] elements (Iterable<dynamic>) will need runtime check to cast to type Iterable<E> (dart:collection/queue.dart, line 208, col 23)
+warning: [DownCastComposite] list (Queue<E>) will need runtime check to cast to type DoubleLinkedQueue<E> (dart:collection/queue.dart, line 211, col 12)
+warning: [DownCastComposite] sourceList (List<dynamic>) will need runtime check to cast to type Iterable<E> (dart:collection/queue.dart, line 402, col 40)
+warning: [DownCastComposite] elements (Iterable<dynamic>) will need runtime check to cast to type Iterable<E> (dart:collection/queue.dart, line 411, col 31)
+warning: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<E> (dart:collection/queue.dart, line 480, col 52)
+warning: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<E> (dart:collection/queue.dart, line 486, col 52)
+warning: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<E> (dart:collection/queue.dart, line 490, col 52)
+warning: [DownCastComposite] list (List<dynamic>) will need runtime check to cast to type Iterable<E> (dart:collection/queue.dart, line 491, col 40)
+warning: [DownCastComposite] _queue._table[_position] (dynamic) will need runtime check to cast to type E (dart:collection/queue.dart, line 738, col 16)
+severe: [AnalyzerMessage] The getter '_validKey' is not defined for the class '_SplayTree<K>' (dart:collection/splay_tree.dart, line 610, col 60)
+severe: [AnalyzerMessage] The getter '_comparator' is not defined for the class '_SplayTree<K>' (dart:collection/splay_tree.dart, line 610, col 38)
+warning: [DownCastComposite] current (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeNode<K> (dart:collection/splay_tree.dart, line 151, col 12)
+warning: [DownCastComposite] current (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeNode<K> (dart:collection/splay_tree.dart, line 167, col 12)
+warning: [DownCastComposite] (compare == null) ? Comparable.compare : compare (Function) will need runtime check to cast to type (K, K) → int (dart:collection/splay_tree.dart, line 265, col 23)
+severe: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type K (dart:collection/splay_tree.dart, line 266, col 65)
+warning: [DownCastComposite] v (dynamic) will need runtime check to cast to type V (dart:collection/splay_tree.dart, line 275, col 40)
+warning: [DownCastComposite] k (dynamic) will need runtime check to cast to type K (dart:collection/splay_tree.dart, line 275, col 35)
+warning: [DownCastComposite] key (Object) will need runtime check to cast to type K (dart:collection/splay_tree.dart, line 328, col 25)
+warning: [DownCastComposite] mapRoot.value (dynamic) will need runtime check to cast to type V (dart:collection/splay_tree.dart, line 331, col 16)
+warning: [DownCastComposite] key (Object) will need runtime check to cast to type K (dart:collection/splay_tree.dart, line 339, col 41)
+warning: [DownCastComposite] mapRoot.value (dynamic) will need runtime check to cast to type V (dart:collection/splay_tree.dart, line 340, col 33)
+warning: [DownCastComposite] mapRoot.value (dynamic) will need runtime check to cast to type V (dart:collection/splay_tree.dart, line 363, col 14)
+warning: [DownCastComposite] nodes.current (_SplayTreeNode<K>) will need runtime check to cast to type _SplayTreeMapNode<K, V> (dart:collection/splay_tree.dart, line 394, col 38)
+warning: [DownCastComposite] key (Object) will need runtime check to cast to type K (dart:collection/splay_tree.dart, line 408, col 37)
+warning: [DownCastImplicit] node.right (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeMapNode<dynamic, dynamic> (dart:collection/splay_tree.dart, line 420, col 41)
+warning: [DownCastImplicit] node.left (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeMapNode<dynamic, dynamic> (dart:collection/splay_tree.dart, line 421, col 16)
+warning: [DownCastImplicit] _root (_SplayTreeNode<K>) will need runtime check to cast to type _SplayTreeMapNode<dynamic, dynamic> (dart:collection/splay_tree.dart, line 425, col 18)
+warning: [DownCastComposite] _first.key (dynamic) will need runtime check to cast to type K (dart:collection/splay_tree.dart, line 441, col 12)
+warning: [DownCastComposite] _last.key (dynamic) will need runtime check to cast to type K (dart:collection/splay_tree.dart, line 449, col 12)
+warning: [DownCastImplicit] _currentNode (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeMapNode<dynamic, dynamic> (dart:collection/splay_tree.dart, line 545, col 22)
+warning: [DownCastComposite] setOrMap._comparator (dynamic) will need runtime check to cast to type (K, K) → int (dart:collection/splay_tree.dart, line 610, col 29)
+warning: [DownCastComposite] setOrMap._validKey (dynamic) will need runtime check to cast to type (Object) → bool (dart:collection/splay_tree.dart, line 610, col 51)
+warning: [DownCastComposite] node.key (dynamic) will need runtime check to cast to type K (dart:collection/splay_tree.dart, line 628, col 39)
+warning: [DownCastComposite] node.value (dynamic) will need runtime check to cast to type V (dart:collection/splay_tree.dart, line 633, col 42)
+warning: [DownCastComposite] node (_SplayTreeNode<dynamic>) will need runtime check to cast to type _SplayTreeNode<K> (dart:collection/splay_tree.dart, line 641, col 55)
+warning: [DownCastComposite] (compare == null) ? Comparable.compare : compare (Function) will need runtime check to cast to type (E, E) → int (dart:collection/splay_tree.dart, line 691, col 23)
+severe: [InvalidRuntimeCheckError] Invalid runtime check on non-ground type E (dart:collection/splay_tree.dart, line 692, col 65)
+warning: [DownCastComposite] elements (Iterable<dynamic>) will need runtime check to cast to type Iterable<E> (dart:collection/splay_tree.dart, line 705, col 29)
+warning: [DownCastComposite] _first.key (dynamic) will need runtime check to cast to type E (dart:collection/splay_tree.dart, line 723, col 12)
+warning: [DownCastComposite] _last.key (dynamic) will need runtime check to cast to type E (dart:collection/splay_tree.dart, line 728, col 12)
+warning: [DownCastComposite] object (Object) will need runtime check to cast to type E (dart:collection/splay_tree.dart, line 739, col 40)
+warning: [DownCastComposite] object (Object) will need runtime check to cast to type E (dart:collection/splay_tree.dart, line 751, col 20)
+warning: [DownCastComposite] element (Object) will need runtime check to cast to type E (dart:collection/splay_tree.dart, line 765, col 39)
+warning: [DownCastComposite] object (Object) will need runtime check to cast to type E (dart:collection/splay_tree.dart, line 779, col 39)
+warning: [DownCastComposite] object (Object) will need runtime check to cast to type E (dart:collection/splay_tree.dart, line 791, col 23)
+severe: [AnalyzerMessage] The getter 'length' is not defined for the class 'NativeTypedData' (dart:_native_typed_data, line 452, col 28)
+severe: [AnalyzerMessage] The final variable 'buffer' must be initialized (dart:_native_typed_data, line 427, col 20)
+severe: [AnalyzerMessage] The final variable 'lengthInBytes' must be initialized (dart:_native_typed_data, line 24, col 13)
+severe: [AnalyzerMessage] The final variable 'elementSizeInBytes' must be initialized (dart:_native_typed_data, line 446, col 13)
+severe: [AnalyzerMessage] The final variable 'offsetInBytes' must be initialized (dart:_native_typed_data, line 439, col 13)
+severe: [AnalyzerMessage] The final variable 'lengthInBytes' must be initialized (dart:_native_typed_data, line 433, col 13)
+warning: [DownCastImplicit] _storage.sublist(start * 4, end * 4) (List<double>) will need runtime check to cast to type NativeFloat32List (dart:_native_typed_data, line 201, col 9)
+warning: [DownCastImplicit] _storage.sublist(start * 4, end * 4) (List<int>) will need runtime check to cast to type Int32List (dart:_native_typed_data, line 311, col 9)
+warning: [DownCastImplicit] _storage.sublist(start * 2, end * 2) (List<double>) will need runtime check to cast to type NativeFloat64List (dart:_native_typed_data, line 415, col 9)
+warning: [DownCastImplicit] length == null ? _create2(buffer, offsetInBytes) : _create3(buffer, offsetInBytes, length) (Int8List) will need runtime check to cast to type NativeInt8List (dart:_native_typed_data, line 1106, col 12)
+warning: [DownCastComposite] IsolateNatives.spawnFunction(entryPoint, message, paused).then((msg) => new Isolate(msg[1], pauseCapability: msg[2], terminateCapability: msg[3])) (Future<dynamic>) will need runtime check to cast to type Future<Isolate> (dart:isolate, line 168, col 14)
+warning: [DownCastComposite] IsolateNatives.spawnUri(uri, args, message, paused).then((msg) => new Isolate(msg[1], pauseCapability: msg[2], terminateCapability: msg[3])) (Future<dynamic>) will need runtime check to cast to type Future<Isolate> (dart:isolate, line 234, col 14)
+warning: [DownCastComposite] doneHandlers (dynamic) will need runtime check to cast to type Iterable<SendPort> (dart:_isolate_helper, line 574, col 29)
+warning: [DownCastComposite] args (dynamic) will need runtime check to cast to type List<String> (dart:_isolate_helper, line 833, col 37)
+warning: [DownCastComposite] msg['args'] (dynamic) will need runtime check to cast to type List<String> (dart:_isolate_helper, line 880, col 11)
+warning: [DownCastImplicit] indexable (JSIndexable) will need runtime check to cast to type JSArray<dynamic> (dart:_isolate_helper/isolate_serialization.dart, line 89, col 38)
+warning: [DownCastImplicit] serializeTearOff (Function) will need runtime check to cast to type (dynamic) → dynamic (dart:_isolate_helper/isolate_serialization.dart, line 120, col 24)
+warning: [DownCastImplicit] serializeTearOff (Function) will need runtime check to cast to type (dynamic) → dynamic (dart:_isolate_helper/isolate_serialization.dart, line 121, col 26)
+warning: [DownCastImplicit] fields (List<dynamic>) will need runtime check to cast to type JSArray<dynamic> (dart:_isolate_helper/isolate_serialization.dart, line 172, col 52)
+warning: [DownCastImplicit] result (List<dynamic>) will need runtime check to cast to type JSArray<dynamic> (dart:_isolate_helper/isolate_serialization.dart, line 250, col 58)
+warning: [DownCastImplicit] result (List<dynamic>) will need runtime check to cast to type JSArray<dynamic> (dart:_isolate_helper/isolate_serialization.dart, line 258, col 61)
+warning: [DownCastImplicit] result (List<dynamic>) will need runtime check to cast to type JSArray<dynamic> (dart:_isolate_helper/isolate_serialization.dart, line 266, col 36)
+warning: [DownCastImplicit] result (List<dynamic>) will need runtime check to cast to type JSArray<dynamic> (dart:_isolate_helper/isolate_serialization.dart, line 275, col 58)
+warning: [DownCastImplicit] fields (List<dynamic>) will need runtime check to cast to type JSArray<dynamic> (dart:_isolate_helper/isolate_serialization.dart, line 357, col 29)
+warning: [DownCastImplicit] errorHandler (Function) will need runtime check to cast to type (dynamic) → dynamic (dart:async/async_error.dart, line 20, col 39)
+severe: [AnalyzerMessage] The getter '_next' is not defined for the class 'StreamSubscription<T>' (dart:async/broadcast_stream_controller.dart, line 211, col 38)
+severe: [AnalyzerMessage] The method '_setRemoveAfterFiring' is not defined for the class 'StreamSubscription<T>' (dart:async/broadcast_stream_controller.dart, line 209, col 20)
+severe: [AnalyzerMessage] The getter '_next' is not defined for the class 'StreamSubscription<T>' (dart:async/broadcast_stream_controller.dart, line 207, col 36)
+severe: [AnalyzerMessage] The getter '_isFiring' is not defined for the class 'StreamSubscription<T>' (dart:async/broadcast_stream_controller.dart, line 208, col 22)
+severe: [AnalyzerMessage] The getter '_next' is not defined for the class 'StreamSubscription<T>' (dart:async/broadcast_stream_controller.dart, line 206, col 32)
+warning: [DownCastComposite] controller (_StreamControllerLifecycle<dynamic>) will need runtime check to cast to type _StreamControllerLifecycle<T> (dart:async/broadcast_stream_controller.dart, line 8, col 67)
+warning: [DownCastComposite] controller (_StreamControllerLifecycle<dynamic>) will need runtime check to cast to type _StreamControllerLifecycle<T> (dart:async/broadcast_stream_controller.dart, line 36, col 15)
+warning: [DownCastComposite] super._controller (_StreamControllerLifecycle<T>) will need runtime check to cast to type _BroadcastStreamController<T> (dart:async/broadcast_stream_controller.dart, line 40, col 52)
+warning: [DownCastComposite] subscription (StreamSubscription<dynamic>) will need runtime check to cast to type _BroadcastSubscription<T> (dart:async/broadcast_stream_controller.dart, line 196, col 18)
+warning: [DownCastComposite] subscription (StreamSubscription<dynamic>) will need runtime check to cast to type StreamSubscription<T> (dart:async/broadcast_stream_controller.dart, line 201, col 12)
+warning: [DownCastComposite] subscription (StreamSubscription<T>) will need runtime check to cast to type _BroadcastSubscription<T> (dart:async/broadcast_stream_controller.dart, line 212, col 23)
+warning: [DownCastComposite] link (_BroadcastSubscriptionLink) will need runtime check to cast to type _BroadcastSubscription<T> (dart:async/broadcast_stream_controller.dart, line 309, col 48)
+warning: [UninferredClosure] (_BroadcastSubscription<T> subscription) {subscription._close();} ((_BroadcastSubscription<T>) → dynamic) will need runtime check to cast to type (_BufferingStreamSubscription<T>) → void (dart:async/broadcast_stream_controller.dart, line 372, col 24)
+warning: [DownCastComposite] link (_BroadcastSubscriptionLink) will need runtime check to cast to type _BroadcastSubscription<T> (dart:async/broadcast_stream_controller.dart, line 393, col 48)
+warning: [DownCastComposite] link (_BroadcastSubscriptionLink) will need runtime check to cast to type _BroadcastSubscription<T> (dart:async/broadcast_stream_controller.dart, line 402, col 48)
+warning: [DownCastComposite] link (_BroadcastSubscriptionLink) will need runtime check to cast to type _BroadcastSubscription<T> (dart:async/broadcast_stream_controller.dart, line 412, col 50)
+warning: [DownCastComposite] result (_Future<dynamic>) will need runtime check to cast to type Future<T> (dart:async/future.dart, line 123, col 12)
+warning: [DownCastComposite] result (_Future<dynamic>) will need runtime check to cast to type Future<T> (dart:async/future.dart, line 149, col 12)
+warning: [DownCastComposite] result (_Future<dynamic>) will need runtime check to cast to type Future<T> (dart:async/future.dart, line 233, col 12)
+warning: [DownCastImplicit] callback (Function) will need runtime check to cast to type (dynamic) → dynamic (dart:async/future_impl.dart, line 112, col 12)
+warning: [DownCastComposite] callback (Function) will need runtime check to cast to type (dynamic) → bool (dart:async/future_impl.dart, line 117, col 12)
+warning: [DownCastImplicit] callback (Function) will need runtime check to cast to type () → dynamic (dart:async/future_impl.dart, line 121, col 12)
+warning: [DownCastComposite] result._zone.registerUnaryCallback(f) ((dynamic) → dynamic) will need runtime check to cast to type (T) → dynamic (dart:async/future_impl.dart, line 208, col 11)
+warning: [DownCastComposite] result._zone.registerUnaryCallback(test) ((dynamic) → dynamic) will need runtime check to cast to type (dynamic) → bool (dart:async/future_impl.dart, line 221, col 32)
+warning: [DownCastComposite] result (_Future<dynamic>) will need runtime check to cast to type Future<T> (dart:async/future_impl.dart, line 233, col 12)
+warning: [DownCastComposite] _resultOrListeners (dynamic) will need runtime check to cast to type T (dart:async/future_impl.dart, line 245, col 12)
+warning: [DownCastComposite] value (dynamic) will need runtime check to cast to type T (dart:async/future_impl.dart, line 347, col 17)
+warning: [DownCastComposite] value (dynamic) will need runtime check to cast to type T (dart:async/future_impl.dart, line 357, col 15)
+warning: [DownCastComposite] value (dynamic) will need runtime check to cast to type Future<T> (dart:async/future_impl.dart, line 386, col 31)
+warning: [DownCastComposite] typedFuture (Future<T>) will need runtime check to cast to type _Future<T> (dart:async/future_impl.dart, line 388, col 33)
+warning: [DownCastComposite] value (dynamic) will need runtime check to cast to type T (dart:async/future_impl.dart, line 407, col 22)
+warning: [DownCastImplicit] errorCallback (Function) will need runtime check to cast to type (dynamic) → dynamic (dart:async/future_impl.dart, line 515, col 54)
+warning: [DownCastComposite] callback (dynamic) will need runtime check to cast to type () → void (dart:async/schedule_microtask.dart, line 66, col 61)
+warning: [DownCastComposite] callback (dynamic) will need runtime check to cast to type () → void (dart:async/schedule_microtask.dart, line 71, col 60)
+warning: [DownCastComposite] callback (dynamic) will need runtime check to cast to type () → void (dart:async/schedule_microtask.dart, line 84, col 55)
+severe: [AnalyzerMessage] The method '_addError' is not defined for the class 'StreamController' (dart:async/stream.dart, line 1227, col 17)
+severe: [AnalyzerMessage] The getter '_addError' is not defined for the class 'StreamController' (dart:async/stream.dart, line 396, col 30)
+severe: [AnalyzerMessage] The getter '_addError' is not defined for the class 'StreamController' (dart:async/stream.dart, line 321, col 34)
+warning: [DownCastComposite] value (dynamic) will need runtime check to cast to type T (dart:async/stream.dart, line 90, col 25)
+warning: [DownCastComposite] mapSink ((EventSink<T>) → EventSink<dynamic>) will need runtime check to cast to type (EventSink<dynamic>) → EventSink<dynamic> (dart:async/stream.dart, line 217, col 41)
+warning: [DownCastComposite] onListen ((StreamSubscription<T>) → void) will need runtime check to cast to type (StreamSubscription<dynamic>) → void (dart:async/stream.dart, line 249, col 44)
+warning: [DownCastComposite] onCancel ((StreamSubscription<T>) → void) will need runtime check to cast to type (StreamSubscription<dynamic>) → void (dart:async/stream.dart, line 249, col 54)
+warning: [DownCastComposite] _cancelAndErrorClosure(subscription, result) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic (dart:async/stream.dart, line 502, col 24)
+warning: [DownCastComposite] _cancelAndErrorClosure(subscription, result) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic (dart:async/stream.dart, line 535, col 11)
+warning: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic (dart:async/stream.dart, line 603, col 13)
+warning: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic (dart:async/stream.dart, line 629, col 13)
+warning: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic (dart:async/stream.dart, line 658, col 13)
+warning: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic (dart:async/stream.dart, line 695, col 13)
+warning: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic (dart:async/stream.dart, line 1037, col 11)
+warning: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic (dart:async/stream.dart, line 1078, col 11)
+warning: [DownCastComposite] _cancelAndErrorClosure(subscription, future) (dynamic) will need runtime check to cast to type (dynamic, StackTrace) → dynamic (dart:async/stream.dart, line 1130, col 11)
+warning: [DownCastComposite] timeout (Function) will need runtime check to cast to type () → void (dart:async/stream.dart, line 1220, col 43)
+warning: [DownCastComposite] timeout (Function) will need runtime check to cast to type () → void (dart:async/stream.dart, line 1228, col 43)
+warning: [DownCastComposite] zone.registerUnaryCallback(onTimeout) ((dynamic) → dynamic) will need runtime check to cast to type (EventSink<dynamic>) → void (dart:async/stream.dart, line 1246, col 21)
+warning: [DownCastComposite] timeout (Function) will need runtime check to cast to type () → void (dart:async/stream.dart, line 1257, col 43)
+warning: [DownCastComposite] timeout (Function) will need runtime check to cast to type () → void (dart:async/stream.dart, line 1276, col 53)
+warning: [DownCastComposite] sync ? new _NoCallbackSyncStreamController() : new _NoCallbackAsyncStreamController() (_StreamController<dynamic>) will need runtime check to cast to type StreamController<T> (dart:async/stream_controller.dart, line 83, col 14)
+warning: [DownCastComposite] subscription (_ControllerSubscription<dynamic>) will need runtime check to cast to type StreamSubscription<T> (dart:async/stream_controller.dart, line 516, col 12)
+warning: [DownCastComposite] controller (_StreamController<dynamic>) will need runtime check to cast to type _EventSink<T> (dart:async/stream_controller.dart, line 798, col 15)
+warning: [DownCastComposite] _nullDataHandler ((dynamic) → void) will need runtime check to cast to type (T) → void (dart:async/stream_impl.dart, line 153, col 42)
+warning: [DownCastComposite] _zone.registerUnaryCallback(handleData) ((dynamic) → dynamic) will need runtime check to cast to type (T) → void (dart:async/stream_impl.dart, line 154, col 15)
+warning: [DownCastImplicit] _onError (Function) will need runtime check to cast to type (dynamic, dynamic) → dynamic (dart:async/stream_impl.dart, line 358, col 32)
+warning: [DownCastImplicit] _onError (Function) will need runtime check to cast to type (dynamic) → dynamic (dart:async/stream_impl.dart, line 360, col 31)
+warning: [DownCastComposite] subscription (StreamSubscription<dynamic>) will need runtime check to cast to type StreamSubscription<T> (dart:async/stream_impl.dart, line 476, col 12)
+warning: [DownCastComposite] new _BufferingStreamSubscription(onData, onError, onDone, cancelOnError).._setPendingEvents(_pending()) (_BufferingStreamSubscription<dynamic>) will need runtime check to cast to type StreamSubscription<T> (dart:async/stream_impl.dart, line 515, col 12)
+warning: [DownCastComposite] Zone.current.registerUnaryCallback(onListenHandler) ((dynamic) → dynamic) will need runtime check to cast to type (StreamSubscription<dynamic>) → void (dart:async/stream_impl.dart, line 813, col 28)
+warning: [DownCastComposite] Zone.current.registerUnaryCallback(onCancelHandler) ((dynamic) → dynamic) will need runtime check to cast to type (StreamSubscription<dynamic>) → void (dart:async/stream_impl.dart, line 814, col 28)
+warning: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type Future<bool> (dart:async/stream_impl.dart, line 1000, col 14)
+warning: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type T (dart:async/stream_impl.dart, line 1006, col 22)
+warning: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type _Future<bool> (dart:async/stream_impl.dart, line 1033, col 31)
+warning: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type _Future<bool> (dart:async/stream_impl.dart, line 1045, col 31)
+warning: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type _Future<bool> (dart:async/stream_impl.dart, line 1059, col 31)
+warning: [DownCastComposite] _futureOrPrefetch (dynamic) will need runtime check to cast to type _Future<bool> (dart:async/stream_impl.dart, line 1073, col 31)
+warning: [DownCastComposite] outputData (dynamic) will need runtime check to cast to type T (dart:async/stream_pipe.dart, line 104, col 15)
+warning: [DownCastComposite] _transform(inputEvent) (dynamic) will need runtime check to cast to type T (dart:async/stream_pipe.dart, line 235, col 21)
+warning: [DownCastComposite] _previous (Object) will need runtime check to cast to type T (dart:async/stream_pipe.dart, line 426, col 29)
+warning: [DownCastComposite] _sinkMapper ((EventSink<T>) → EventSink<S>) will need runtime check to cast to type (EventSink<dynamic>) → EventSink<dynamic> (dart:async/stream_transformers.dart, line 187, col 18)
+warning: [UninferredClosure] (EventSink<T> outputSink) {if (handleData == null) handleData = _defaultHandleData; if (handleError == null) handleError = _defaultHandleError; if (handleDone == null) handleDone = _defaultHandleDone; return new _HandlerEventSink<S, T>(handleData, handleError, handleDone, outputSink);} ((EventSink<T>) → dynamic) will need runtime check to cast to type (EventSink<T>) → EventSink<S> (dart:async/stream_transformers.dart, line 233, col 15)
+warning: [DownCastComposite] _defaultHandleData ((dynamic, EventSink<dynamic>) → void) will need runtime check to cast to type (S, EventSink<T>) → void (dart:async/stream_transformers.dart, line 234, col 48)
+warning: [DownCastComposite] _defaultHandleError ((dynamic, StackTrace, EventSink<dynamic>) → void) will need runtime check to cast to type (Object, StackTrace, EventSink<T>) → void (dart:async/stream_transformers.dart, line 235, col 50)
+warning: [DownCastComposite] Zone.current.bindUnaryCallback(callback, runGuarded: true) ((dynamic) → dynamic) will need runtime check to cast to type (Timer) → void (dart:async/timer.dart, line 80, col 19)
+warning: [DownCastImplicit] implementationZone (Zone) will need runtime check to cast to type _Zone (dart:async/zone.dart, line 845, col 57)
+warning: [DownCastComposite] zone.bindUnaryCallback(callback) ((dynamic) → dynamic) will need runtime check to cast to type (Timer) → void (dart:async/zone.dart, line 962, col 16)
+warning: [DownCastImplicit] zone (Zone) will need runtime check to cast to type _Zone (dart:async/zone.dart, line 999, col 26)
+warning: [DownCastImplicit] onError (Function) will need runtime check to cast to type (dynamic) → dynamic (dart:async/zone.dart, line 1228, col 37)
+warning: [DownCastImplicit] key (Object) will need runtime check to cast to type String (dart:convert, line 176, col 45)
+warning: [DownCastImplicit] key (Object) will need runtime check to cast to type String (dart:convert, line 177, col 53)
+warning: [DownCastImplicit] key (Object) will need runtime check to cast to type String (dart:convert, line 233, col 36)
+warning: [DownCastComposite] JS('JSExtendableArray', '#', keys) (dynamic) will need runtime check to cast to type List<String> (dart:convert, line 311, col 12)
+warning: [DownCastComposite] result (List<dynamic>) will need runtime check to cast to type List<int> (dart:convert/ascii.dart, line 96, col 12)
+warning: [DownCastImplicit] sink (Sink<List<int>>) will need runtime check to cast to type ByteConversionSink (dart:convert/ascii.dart, line 109, col 55)
+warning: [DownCastComposite] _first.encoder.fuse(_second.encoder) (Converter<S, dynamic>) will need runtime check to cast to type Converter<S, T> (dart:convert/codec.dart, line 87, col 34)
+warning: [DownCastComposite] _second.decoder.fuse(_first.decoder) (Converter<T, dynamic>) will need runtime check to cast to type Converter<T, S> (dart:convert/codec.dart, line 88, col 34)
+warning: [DownCastComposite] _second.convert(_first.convert(input)) (dynamic) will need runtime check to cast to type T (dart:convert/converter.dart, line 58, col 25)
+warning: [DownCastComposite] byteStream.transform(decoder).fold(new StringBuffer(), (buffer, string) => buffer..write(string)).then((buffer) => buffer.toString()) (Future<dynamic>) will need runtime check to cast to type Future<String> (dart:convert/encoding.dart, line 14, col 12)
+warning: [DownCastImplicit] sink (Sink<String>) will need runtime check to cast to type StringConversionSink (dart:convert/html_escape.dart, line 79, col 38)
+warning: [DownCastComposite] toEncodable ((dynamic) → dynamic) will need runtime check to cast to type (Object) → Object (dart:convert/json.dart, line 142, col 28)
+warning: [DownCastComposite] _toEncodable ((dynamic) → dynamic) will need runtime check to cast to type (Object) → Object (dart:convert/json.dart, line 147, col 28)
+warning: [DownCastImplicit] _toEncodable (Function) will need runtime check to cast to type (dynamic) → dynamic (dart:convert/json.dart, line 243, col 48)
+warning: [DownCastImplicit] sink (Sink<String>) will need runtime check to cast to type StringConversionSink (dart:convert/json.dart, line 262, col 33)
+warning: [DownCastComposite] _toEncodable (Function) will need runtime check to cast to type (Object) → dynamic (dart:convert/json.dart, line 270, col 42)
+warning: [DownCastComposite] _toEncodable (Function) will need runtime check to cast to type (Object) → dynamic (dart:convert/json.dart, line 352, col 36)
+warning: [DownCastImplicit] _toEncodable (Function) will need runtime check to cast to type (dynamic) → dynamic (dart:convert/json.dart, line 425, col 51)
+warning: [DownCastComposite] _toEncodable (Function) will need runtime check to cast to type (Object) → dynamic (dart:convert/json.dart, line 455, col 53)
+warning: [DownCastComposite] object (dynamic) will need runtime check to cast to type Map<String, Object> (dart:convert/json.dart, line 715, col 16)
+warning: [DownCastComposite] _toEncodable (dynamic) will need runtime check to cast to type (Object) → Object (dart:convert/json.dart, line 817, col 60)
+warning: [DownCastComposite] toEncodable (dynamic) will need runtime check to cast to type (Object) → Object (dart:convert/json.dart, line 895, col 15)
+warning: [DownCastComposite] sink (Sink<dynamic>) will need runtime check to cast to type Sink<String> (dart:convert/line_splitter.dart, line 24, col 44)
+warning: [DownCastImplicit] sink (Sink<dynamic>) will need runtime check to cast to type StringConversionSink (dart:convert/line_splitter.dart, line 26, col 34)
+warning: [DownCastImplicit] sink (Sink<List<int>>) will need runtime check to cast to type ByteConversionSink (dart:convert/utf.dart, line 125, col 33)
+warning: [DownCastImplicit] symbol (Symbol) will need runtime check to cast to type Symbol (dart:core, line 206, col 69)
+warning: [DownCastImplicit] Primitives.dateNow() (num) will need runtime check to cast to type int (dart:core/date_time.dart, line 593, col 34)
+warning: [DownCastImplicit] inMinutes.remainder(MINUTES_PER_HOUR) (num) will need runtime check to cast to type int (dart:core/duration.dart, line 258, col 40)
+warning: [DownCastImplicit] inSeconds.remainder(SECONDS_PER_MINUTE) (num) will need runtime check to cast to type int (dart:core/duration.dart, line 259, col 40)
+warning: [DownCastImplicit] inMicroseconds.remainder(MICROSECONDS_PER_SECOND) (num) will need runtime check to cast to type int (dart:core/duration.dart, line 261, col 19)
+warning: [DownCastComposite] (generator != null) ? generator : _id (Function) will need runtime check to cast to type (int) → E (dart:core/iterable.dart, line 319, col 22)
+warning: [DownCastComposite] e (dynamic) will need runtime check to cast to type E (dart:core/list.dart, line 121, col 16)
+warning: [DownCastComposite] makeListFixedLength(list) (List<dynamic>) will need runtime check to cast to type List<E> (dart:core/list.dart, line 124, col 12)
+warning: [DownCastImplicit] (_stop == null) ? (_now() - _start) : (_stop - _start) (num) will need runtime check to cast to type int (dart:core/stopwatch.dart, line 102, col 12)
+warning: [DownCastImplicit] _currentCodePoint (num) will need runtime check to cast to type int (dart:core/string.dart, line 753, col 22)
+warning: [DownCastImplicit] _port (num) will need runtime check to cast to type int (dart:core/uri.dart, line 94, col 12)
+warning: [DownCastImplicit] this._port (num) will need runtime check to cast to type int (dart:core/uri.dart, line 893, col 14)
+warning: [DownCastComposite] _userinfoTable (List<dynamic>) will need runtime check to cast to type List<int> (dart:core/uri.dart, line 1131, col 45)
+warning: [DownCastComposite] _pathCharOrSlashTable (List<dynamic>) will need runtime check to cast to type List<int> (dart:core/uri.dart, line 1144, col 45)
+warning: [DownCastComposite] _pathCharTable (List<dynamic>) will need runtime check to cast to type List<int> (dart:core/uri.dart, line 1146, col 51)
+warning: [DownCastComposite] _queryCharTable (List<dynamic>) will need runtime check to cast to type List<int> (dart:core/uri.dart, line 1163, col 61)
+warning: [DownCastComposite] _queryCharTable (List<dynamic>) will need runtime check to cast to type List<int> (dart:core/uri.dart, line 1183, col 45)
+warning: [DownCastComposite] codeUnits (List<dynamic>) will need runtime check to cast to type Iterable<int> (dart:core/uri.dart, line 1278, col 37)
+warning: [DownCastImplicit] this._port (num) will need runtime check to cast to type int (dart:core/uri.dart, line 1494, col 22)
+warning: [DownCastComposite] _unreserved2396Table (List<dynamic>) will need runtime check to cast to type List<int> (dart:core/uri.dart, line 1754, col 23)
+warning: [DownCastComposite] _unreservedTable (List<dynamic>) will need runtime check to cast to type List<int> (dart:core/uri.dart, line 1793, col 9)
+warning: [DownCastComposite] _encodeFullTable (List<dynamic>) will need runtime check to cast to type List<int> (dart:core/uri.dart, line 1837, col 23)
+warning: [DownCastComposite] query.split("&").fold({}, (map, element) {int index = element.indexOf("="); if (index == -1) {if (element != "") {map[decodeQueryComponent(element, encoding: encoding)] = "";}} else if (index != 0) {var key = element.substring(0, index); var value = element.substring(index + 1); map[Uri.decodeQueryComponent(key, encoding: encoding)] = decodeQueryComponent(value, encoding: encoding);} return map;}) (dynamic) will need runtime check to cast to type Map<String, String> (dart:core/uri.dart, line 1869, col 12)
+warning: [DownCastComposite] bytes.map((byteString) {int byte = int.parse(byteString); if (byte < 0 || byte > 255) {error('each part must be in the range of `0..255`');} return byte;}).toList() (List<dynamic>) will need runtime check to cast to type List<int> (dart:core/uri.dart, line 1901, col 12)
+warning: [DownCastComposite] bytes (List<dynamic>) will need runtime check to cast to type List<int> (dart:core/uri.dart, line 2023, col 12)
+warning: [DownCastImplicit] JS('num', r'parseInt(#, 16)', source) (num) will need runtime check to cast to type int (dart:_js_helper, line 87, col 18)
+warning: [DownCastImplicit] JS('num', r'parseInt(#, 10)', source) (num) will need runtime check to cast to type int (dart:_js_helper, line 91, col 18)
+warning: [DownCastImplicit] JS('num', r'parseInt(#, 10)', source) (num) will need runtime check to cast to type int (dart:_js_helper, line 103, col 18)
+warning: [DownCastImplicit] JS('num', r'parseInt(#, #)', source, radix) (num) will need runtime check to cast to type int (dart:_js_helper, line 135, col 12)
+warning: [DownCastImplicit] result (num) will need runtime check to cast to type double (dart:_js_helper, line 159, col 16)
+warning: [DownCastImplicit] result (num) will need runtime check to cast to type double (dart:_js_helper, line 163, col 12)
+warning: [DownCastImplicit] 0xd800 + ((((i - 0x10000) >> 10) & 0x3ff)) (num) will need runtime check to cast to type int (dart:_js_helper, line 250, col 15)
+warning: [DownCastImplicit] 0xdc00 + (i & 0x3ff) (num) will need runtime check to cast to type int (dart:_js_helper, line 251, col 15)
+warning: [DownCastComposite] charCodes (dynamic) will need runtime check to cast to type List<int> (dart:_js_helper, line 265, col 31)
+warning: [DownCastComposite] JS('JSExtendableArray|Null', r'#.exec(#)', _nativeRegExp, checkString(string)) (dynamic) will need runtime check to cast to type List<String> (dart:_js_helper/regexp_helper.dart, line 108, col 22)
+warning: [DownCastComposite] match (List<dynamic>) will need runtime check to cast to type List<String> (dart:_js_helper/regexp_helper.dart, line 140, col 43)
+warning: [DownCastComposite] match (List<dynamic>) will need runtime check to cast to type List<String> (dart:_js_helper/regexp_helper.dart, line 152, col 43)
+warning: [DownCastComposite] pattern.allMatches(receiver) (dynamic) will need runtime check to cast to type Iterable<Match> (dart:_js_helper/string_helper.dart, line 137, col 23)
+warning: [DownCastComposite] _convertToJS ((dynamic) → dynamic) will need runtime check to cast to type (E) → dynamic (dart:js, line 325, col 44)
+warning: [DownCastComposite] super[index] (dynamic) will need runtime check to cast to type E (dart:js, line 358, col 12)
+warning: [DownCastImplicit] list (Object) will need runtime check to cast to type List<dynamic> (dart:js, line 394, col 24)
+warning: [DownCastComposite] callMethod('splice', [index, 1])[0] (dynamic) will need runtime check to cast to type E (dart:js, line 404, col 12)
+warning: [DownCastComposite] callMethod('pop') (dynamic) will need runtime check to cast to type E (dart:js, line 409, col 12)
+warning: [DownCastImplicit] ms (num) will need runtime check to cast to type int (dart:js, line 486, col 52)
+severe: [AnalyzerMessage] Missing concrete implementation of getter 'TypeMirror.typeArguments', getter 'TypeMirror.isOriginalDeclaration', getter 'DeclarationMirror.owner', getter 'DeclarationMirror.location' and 10 more (dart:_js_mirrors, line 120, col 7)
+severe: [AnalyzerMessage] Missing concrete implementation of getter 'InstanceMirror.type', getter 'InstanceMirror.hasReflectee' and 'InstanceMirror.delegate' (dart:_js_mirrors, line 47, col 7)
+severe: [AnalyzerMessage] Missing concrete implementation of getter 'VariableMirror.isStatic', getter 'VariableMirror.isFinal', getter 'DeclarationMirror.owner', getter 'ParameterMirror.isOptional' and 9 more (dart:_js_mirrors, line 126, col 7)
+severe: [AnalyzerMessage] Missing concrete implementation of getter 'TypeMirror.typeArguments', getter 'ClassMirror.superinterfaces', getter 'TypeMirror.isOriginalDeclaration', getter 'ClassMirror.staticMembers' and 19 more (dart:_js_mirrors, line 84, col 7)
+severe: [AnalyzerMessage] Missing concrete implementation of getter 'MethodMirror.isSetter', getter 'MethodMirror.isConstructor', getter 'MethodMirror.isConstConstructor', getter 'MethodMirror.isAbstract' and 17 more (dart:_js_mirrors, line 134, col 7)
+severe: [AnalyzerMessage] The argument type 'void' cannot be assigned to the parameter type 'Object' (dart:_js_mirrors, line 61, col 35)
+warning: [DownCastImplicit] (tm as ClassMirror).originalDeclaration (TypeMirror) will need runtime check to cast to type ClassMirror (dart:mirrors, line 171, col 10)