Add --modules=node support

lib/runtime/dart/_internal.js

 dart_library.library('dart/_internal', null, /* Imports */[
   'dart/_runtime',
   'dart/core',
   'dart/collection'
 ], /* Lazy imports */[
   'dart/math',
   'dart/_interceptors',
   'dart/_js_primitives'
 ], function(exports, dart, core, collection, math, _interceptors, _js_primitives) {
   'use strict';
@@ skipping 256 matching lines @@
       'toList',
       'toSet',
       'iterator',
       'isEmpty',
       'first',
       'last',
       'single'
     ]);
     return ListIterable;
   });
-  let ListIterable = ListIterable$();
+  const ListIterable = ListIterable$();
   const _iterable = dart.JsSymbol('_iterable');
   const _start = dart.JsSymbol('_start');
   const _endOrLength = dart.JsSymbol('_endOrLength');
   const _endIndex = dart.JsSymbol('_endIndex');
   const _startIndex = dart.JsSymbol('_startIndex');
   const SubListIterable$ = dart.generic(function(E) {
     class SubListIterable extends ListIterable$(E) {
       SubListIterable(iterable, start, endOrLength) {
         this[_iterable] = iterable;
         this[_start] = start;
@@ skipping 80 matching lines @@
     });
     dart.defineExtensionMembers(SubListIterable, [
       'elementAt',
       'skip',
       'take',
       'toList',
       'length'
     ]);
     return SubListIterable;
   });
-  let SubListIterable = SubListIterable$();
+  const SubListIterable = SubListIterable$();
   const _length = dart.JsSymbol('_length');
   const _index = dart.JsSymbol('_index');
   const _current = dart.JsSymbol('_current');
   const ListIterator$ = dart.generic(function(E) {
     class ListIterator extends core.Object {
       ListIterator(iterable) {
         this[_iterable] = iterable;
         this[_length] = iterable[dartx.length];
         this[_index] = 0;
         this[_current] = null;
@@ skipping 15 matching lines @@
         return true;
       }
     }
     ListIterator[dart.implements] = () => [core.Iterator$(E)];
     dart.setSignature(ListIterator, {
       constructors: () => ({ListIterator: [ListIterator$(E), [core.Iterable$(E)]]}),
       methods: () => ({moveNext: [core.bool, []]})
     });
     return ListIterator;
   });
-  let ListIterator = ListIterator$();
+  const ListIterator = ListIterator$();
   const _Transformation$ = dart.generic(function(S, T) {
     const _Transformation = dart.typedef('_Transformation', () => dart.functionType(T, [S]));
     return _Transformation;
   });
-  let _Transformation = _Transformation$();
+  const _Transformation = _Transformation$();
   const _f = dart.JsSymbol('_f');
   const MappedIterable$ = dart.generic(function(S, T) {
     class MappedIterable extends collection.IterableBase$(T) {
       static new(iterable, func) {
         if (dart.is(iterable, EfficientLength)) {
           return new (EfficientLengthMappedIterable$(S, T))(iterable, func);
         }
         return new (MappedIterable$(S, T))._(dart.as(iterable, core.Iterable$(S)), func);
       }
       _(iterable, f) {
@@ skipping 35 matching lines @@
       'elementAt',
       'iterator',
       'length',
       'isEmpty',
       'first',
       'last',
       'single'
     ]);
     return MappedIterable;
   });
-  let MappedIterable = MappedIterable$();
+  const MappedIterable = MappedIterable$();
   const EfficientLengthMappedIterable$ = dart.generic(function(S, T) {
     class EfficientLengthMappedIterable extends MappedIterable$(S, T) {
       EfficientLengthMappedIterable(iterable, func) {
         super._(dart.as(iterable, core.Iterable$(S)), func);
       }
     }
     EfficientLengthMappedIterable[dart.implements] = () => [EfficientLength];
     dart.setSignature(EfficientLengthMappedIterable, {
       constructors: () => ({EfficientLengthMappedIterable: [EfficientLengthMappedIterable$(S, T), [core.Iterable, dart.functionType(T, [S])]]})
     });
     return EfficientLengthMappedIterable;
   });
-  let EfficientLengthMappedIterable = EfficientLengthMappedIterable$();
+  const EfficientLengthMappedIterable = EfficientLengthMappedIterable$();
   const _iterator = dart.JsSymbol('_iterator');
   const MappedIterator$ = dart.generic(function(S, T) {
     class MappedIterator extends core.Iterator$(T) {
       MappedIterator(iterator, f) {
         this[_iterator] = iterator;
         this[_f] = f;
         this[_current] = null;
       }
       moveNext() {
         if (dart.notNull(this[_iterator].moveNext())) {
           this[_current] = this[_f](this[_iterator].current);
           return true;
         }
         this[_current] = null;
         return false;
       }
       get current() {
         return this[_current];
       }
     }
     dart.setSignature(MappedIterator, {
       constructors: () => ({MappedIterator: [MappedIterator$(S, T), [core.Iterator$(S), dart.functionType(T, [S])]]}),
       methods: () => ({moveNext: [core.bool, []]})
     });
     return MappedIterator;
   });
-  let MappedIterator = MappedIterator$();
+  const MappedIterator = MappedIterator$();
   const _source = dart.JsSymbol('_source');
   const MappedListIterable$ = dart.generic(function(S, T) {
     class MappedListIterable extends ListIterable$(T) {
       MappedListIterable(source, f) {
         this[_source] = source;
         this[_f] = f;
         super.ListIterable();
       }
       get length() {
         return this[_source][dartx.length];
       }
       elementAt(index) {
         return this[_f](this[_source][dartx.elementAt](index));
       }
     }
     MappedListIterable[dart.implements] = () => [EfficientLength];
     dart.setSignature(MappedListIterable, {
       constructors: () => ({MappedListIterable: [MappedListIterable$(S, T), [core.Iterable$(S), dart.functionType(T, [S])]]}),
       methods: () => ({elementAt: [T, [core.int]]})
     });
     dart.defineExtensionMembers(MappedListIterable, ['elementAt', 'length']);
     return MappedListIterable;
   });
-  let MappedListIterable = MappedListIterable$();
+  const MappedListIterable = MappedListIterable$();
   const _ElementPredicate$ = dart.generic(function(E) {
     const _ElementPredicate = dart.typedef('_ElementPredicate', () => dart.functionType(core.bool, [E]));
     return _ElementPredicate;
   });
-  let _ElementPredicate = _ElementPredicate$();
+  const _ElementPredicate = _ElementPredicate$();
   const WhereIterable$ = dart.generic(function(E) {
     class WhereIterable extends collection.IterableBase$(E) {
       WhereIterable(iterable, f) {
         this[_iterable] = iterable;
         this[_f] = f;
         super.IterableBase();
       }
       get iterator() {
         return new (WhereIterator$(E))(this[_iterable][dartx.iterator], this[_f]);
       }
     }
     dart.setSignature(WhereIterable, {
       constructors: () => ({WhereIterable: [WhereIterable$(E), [core.Iterable$(E), dart.functionType(core.bool, [E])]]})
     });
     dart.defineExtensionMembers(WhereIterable, ['iterator']);
     return WhereIterable;
   });
-  let WhereIterable = WhereIterable$();
+  const WhereIterable = WhereIterable$();
   const WhereIterator$ = dart.generic(function(E) {
     class WhereIterator extends core.Iterator$(E) {
       WhereIterator(iterator, f) {
         this[_iterator] = iterator;
         this[_f] = f;
       }
       moveNext() {
         while (dart.notNull(this[_iterator].moveNext())) {
           if (dart.notNull(this[_f](this[_iterator].current))) {
             return true;
           }
         }
         return false;
       }
       get current() {
         return this[_iterator].current;
       }
     }
     dart.setSignature(WhereIterator, {
       constructors: () => ({WhereIterator: [WhereIterator$(E), [core.Iterator$(E), dart.functionType(core.bool, [E])]]}),
       methods: () => ({moveNext: [core.bool, []]})
     });
     return WhereIterator;
   });
-  let WhereIterator = WhereIterator$();
+  const WhereIterator = WhereIterator$();
   const _ExpandFunction$ = dart.generic(function(S, T) {
     const _ExpandFunction = dart.typedef('_ExpandFunction', () => dart.functionType(core.Iterable$(T), [S]));
     return _ExpandFunction;
   });
-  let _ExpandFunction = _ExpandFunction$();
+  const _ExpandFunction = _ExpandFunction$();
   const ExpandIterable$ = dart.generic(function(S, T) {
     class ExpandIterable extends collection.IterableBase$(T) {
       ExpandIterable(iterable, f) {
         this[_iterable] = iterable;
         this[_f] = f;
         super.IterableBase();
       }
       get iterator() {
         return new (ExpandIterator$(S, T))(this[_iterable][dartx.iterator], dart.as(this[_f], __CastType0));
       }
     }
     dart.setSignature(ExpandIterable, {
       constructors: () => ({ExpandIterable: [ExpandIterable$(S, T), [core.Iterable$(S), dart.functionType(core.Iterable$(T), [S])]]})
     });
     dart.defineExtensionMembers(ExpandIterable, ['iterator']);
     return ExpandIterable;
   });
-  let ExpandIterable = ExpandIterable$();
+  const ExpandIterable = ExpandIterable$();
   const _currentExpansion = dart.JsSymbol('_currentExpansion');
   const _nextExpansion = dart.JsSymbol('_nextExpansion');
   const ExpandIterator$ = dart.generic(function(S, T) {
     class ExpandIterator extends core.Object {
       ExpandIterator(iterator, f) {
         this[_iterator] = iterator;
         this[_f] = f;
         this[_currentExpansion] = dart.const(new (EmptyIterator$(T))());
         this[_current] = null;
       }
@@ skipping 19 matching lines @@
     ExpandIterator[dart.implements] = () => [core.Iterator$(T)];
     dart.setSignature(ExpandIterator, {
       constructors: () => ({ExpandIterator: [ExpandIterator$(S, T), [core.Iterator$(S), dart.functionType(core.Iterable$(T), [S])]]}),
       methods: () => ({
         [_nextExpansion]: [dart.void, []],
         moveNext: [core.bool, []]
       })
     });
     return ExpandIterator;
   });
-  let ExpandIterator = ExpandIterator$();
+  const ExpandIterator = ExpandIterator$();
   const _takeCount = dart.JsSymbol('_takeCount');
   const TakeIterable$ = dart.generic(function(E) {
     class TakeIterable extends collection.IterableBase$(E) {
       static new(iterable, takeCount) {
         if (!(typeof takeCount == 'number') || dart.notNull(takeCount) < 0) {
           dart.throw(new core.ArgumentError(takeCount));
         }
         if (dart.is(iterable, EfficientLength)) {
           return new (EfficientLengthTakeIterable$(E))(iterable, takeCount);
         }
@@ skipping 11 matching lines @@
     dart.defineNamedConstructor(TakeIterable, '_');
     dart.setSignature(TakeIterable, {
       constructors: () => ({
         new: [TakeIterable$(E), [core.Iterable$(E), core.int]],
         _: [TakeIterable$(E), [core.Iterable$(E), core.int]]
       })
     });
     dart.defineExtensionMembers(TakeIterable, ['iterator']);
     return TakeIterable;
   });
-  let TakeIterable = TakeIterable$();
+  const TakeIterable = TakeIterable$();
   const EfficientLengthTakeIterable$ = dart.generic(function(E) {
     class EfficientLengthTakeIterable extends TakeIterable$(E) {
       EfficientLengthTakeIterable(iterable, takeCount) {
         super._(iterable, takeCount);
       }
       get length() {
         let iterableLength = this[_iterable][dartx.length];
         if (dart.notNull(iterableLength) > dart.notNull(this[_takeCount])) return this[_takeCount];
         return iterableLength;
       }
     }
     EfficientLengthTakeIterable[dart.implements] = () => [EfficientLength];
     dart.setSignature(EfficientLengthTakeIterable, {
       constructors: () => ({EfficientLengthTakeIterable: [EfficientLengthTakeIterable$(E), [core.Iterable$(E), core.int]]})
     });
     dart.defineExtensionMembers(EfficientLengthTakeIterable, ['length']);
     return EfficientLengthTakeIterable;
   });
-  let EfficientLengthTakeIterable = EfficientLengthTakeIterable$();
+  const EfficientLengthTakeIterable = EfficientLengthTakeIterable$();
   const _remaining = dart.JsSymbol('_remaining');
   const TakeIterator$ = dart.generic(function(E) {
     class TakeIterator extends core.Iterator$(E) {
       TakeIterator(iterator, remaining) {
         this[_iterator] = iterator;
         this[_remaining] = remaining;
         dart.assert(typeof this[_remaining] == 'number' && dart.notNull(this[_remaining]) >= 0);
       }
       moveNext() {
         this[_remaining] = dart.notNull(this[_remaining]) - 1;
         if (dart.notNull(this[_remaining]) >= 0) {
           return this[_iterator].moveNext();
         }
         this[_remaining] = -1;
         return false;
       }
       get current() {
         if (dart.notNull(this[_remaining]) < 0) return null;
         return this[_iterator].current;
       }
     }
     dart.setSignature(TakeIterator, {
       constructors: () => ({TakeIterator: [TakeIterator$(E), [core.Iterator$(E), core.int]]}),
       methods: () => ({moveNext: [core.bool, []]})
     });
     return TakeIterator;
   });
-  let TakeIterator = TakeIterator$();
+  const TakeIterator = TakeIterator$();
   const TakeWhileIterable$ = dart.generic(function(E) {
     class TakeWhileIterable extends collection.IterableBase$(E) {
       TakeWhileIterable(iterable, f) {
         this[_iterable] = iterable;
         this[_f] = f;
         super.IterableBase();
       }
       get iterator() {
         return new (TakeWhileIterator$(E))(this[_iterable][dartx.iterator], this[_f]);
       }
     }
     dart.setSignature(TakeWhileIterable, {
       constructors: () => ({TakeWhileIterable: [TakeWhileIterable$(E), [core.Iterable$(E), dart.functionType(core.bool, [E])]]})
     });
     dart.defineExtensionMembers(TakeWhileIterable, ['iterator']);
     return TakeWhileIterable;
   });
-  let TakeWhileIterable = TakeWhileIterable$();
+  const TakeWhileIterable = TakeWhileIterable$();
   const _isFinished = dart.JsSymbol('_isFinished');
   const TakeWhileIterator$ = dart.generic(function(E) {
     class TakeWhileIterator extends core.Iterator$(E) {
       TakeWhileIterator(iterator, f) {
         this[_iterator] = iterator;
         this[_f] = f;
         this[_isFinished] = false;
       }
       moveNext() {
         if (dart.notNull(this[_isFinished])) return false;
         if (!dart.notNull(this[_iterator].moveNext()) || !dart.notNull(this[_f](this[_iterator].current))) {
           this[_isFinished] = true;
           return false;
         }
         return true;
       }
       get current() {
         if (dart.notNull(this[_isFinished])) return null;
         return this[_iterator].current;
       }
     }
     dart.setSignature(TakeWhileIterator, {
       constructors: () => ({TakeWhileIterator: [TakeWhileIterator$(E), [core.Iterator$(E), dart.functionType(core.bool, [E])]]}),
       methods: () => ({moveNext: [core.bool, []]})
     });
     return TakeWhileIterator;
   });
-  let TakeWhileIterator = TakeWhileIterator$();
+  const TakeWhileIterator = TakeWhileIterator$();
   const _skipCount = dart.JsSymbol('_skipCount');
   const SkipIterable$ = dart.generic(function(E) {
     class SkipIterable extends collection.IterableBase$(E) {
       static new(iterable, count) {
         if (dart.is(iterable, EfficientLength)) {
           return new (EfficientLengthSkipIterable$(E))(iterable, count);
         }
         return new (SkipIterable$(E))._(iterable, count);
       }
       _(iterable, skipCount) {
@@ skipping 20 matching lines @@
     dart.setSignature(SkipIterable, {
       constructors: () => ({
         new: [SkipIterable$(E), [core.Iterable$(E), core.int]],
         _: [SkipIterable$(E), [core.Iterable$(E), core.int]]
       }),
       methods: () => ({skip: [core.Iterable$(E), [core.int]]})
     });
     dart.defineExtensionMembers(SkipIterable, ['skip', 'iterator']);
     return SkipIterable;
   });
-  let SkipIterable = SkipIterable$();
+  const SkipIterable = SkipIterable$();
   const EfficientLengthSkipIterable$ = dart.generic(function(E) {
     class EfficientLengthSkipIterable extends SkipIterable$(E) {
       EfficientLengthSkipIterable(iterable, skipCount) {
         super._(iterable, skipCount);
       }
       get length() {
         let length = dart.notNull(this[_iterable][dartx.length]) - dart.notNull(this[_skipCount]);
         if (dart.notNull(length) >= 0) return length;
         return 0;
       }
     }
     EfficientLengthSkipIterable[dart.implements] = () => [EfficientLength];
     dart.setSignature(EfficientLengthSkipIterable, {
       constructors: () => ({EfficientLengthSkipIterable: [EfficientLengthSkipIterable$(E), [core.Iterable$(E), core.int]]})
     });
     dart.defineExtensionMembers(EfficientLengthSkipIterable, ['length']);
     return EfficientLengthSkipIterable;
   });
-  let EfficientLengthSkipIterable = EfficientLengthSkipIterable$();
+  const EfficientLengthSkipIterable = EfficientLengthSkipIterable$();
   const SkipIterator$ = dart.generic(function(E) {
     class SkipIterator extends core.Iterator$(E) {
       SkipIterator(iterator, skipCount) {
         this[_iterator] = iterator;
         this[_skipCount] = skipCount;
         dart.assert(typeof this[_skipCount] == 'number' && dart.notNull(this[_skipCount]) >= 0);
       }
       moveNext() {
         for (let i = 0; dart.notNull(i) < dart.notNull(this[_skipCount]); i = dart.notNull(i) + 1)
           this[_iterator].moveNext();
         this[_skipCount] = 0;
         return this[_iterator].moveNext();
       }
       get current() {
         return this[_iterator].current;
       }
     }
     dart.setSignature(SkipIterator, {
       constructors: () => ({SkipIterator: [SkipIterator$(E), [core.Iterator$(E), core.int]]}),
       methods: () => ({moveNext: [core.bool, []]})
     });
     return SkipIterator;
   });
-  let SkipIterator = SkipIterator$();
+  const SkipIterator = SkipIterator$();
   const SkipWhileIterable$ = dart.generic(function(E) {
     class SkipWhileIterable extends collection.IterableBase$(E) {
       SkipWhileIterable(iterable, f) {
         this[_iterable] = iterable;
         this[_f] = f;
         super.IterableBase();
       }
       get iterator() {
         return new (SkipWhileIterator$(E))(this[_iterable][dartx.iterator], this[_f]);
       }
     }
     dart.setSignature(SkipWhileIterable, {
       constructors: () => ({SkipWhileIterable: [SkipWhileIterable$(E), [core.Iterable$(E), dart.functionType(core.bool, [E])]]})
     });
     dart.defineExtensionMembers(SkipWhileIterable, ['iterator']);
     return SkipWhileIterable;
   });
-  let SkipWhileIterable = SkipWhileIterable$();
+  const SkipWhileIterable = SkipWhileIterable$();
   const _hasSkipped = dart.JsSymbol('_hasSkipped');
   const SkipWhileIterator$ = dart.generic(function(E) {
     class SkipWhileIterator extends core.Iterator$(E) {
       SkipWhileIterator(iterator, f) {
         this[_iterator] = iterator;
         this[_f] = f;
         this[_hasSkipped] = false;
       }
       moveNext() {
         if (!dart.notNull(this[_hasSkipped])) {
           this[_hasSkipped] = true;
           while (dart.notNull(this[_iterator].moveNext())) {
             if (!dart.notNull(this[_f](this[_iterator].current))) return true;
           }
         }
         return this[_iterator].moveNext();
       }
       get current() {
         return this[_iterator].current;
       }
     }
     dart.setSignature(SkipWhileIterator, {
       constructors: () => ({SkipWhileIterator: [SkipWhileIterator$(E), [core.Iterator$(E), dart.functionType(core.bool, [E])]]}),
       methods: () => ({moveNext: [core.bool, []]})
     });
     return SkipWhileIterator;
   });
-  let SkipWhileIterator = SkipWhileIterator$();
+  const SkipWhileIterator = SkipWhileIterator$();
   const EmptyIterable$ = dart.generic(function(E) {
     class EmptyIterable extends collection.IterableBase$(E) {
       EmptyIterable() {
         super.IterableBase();
       }
       get iterator() {
         return dart.const(new (EmptyIterator$(E))());
       }
       forEach(action) {
         dart.as(action, dart.functionType(dart.void, [E]));
@@ skipping 137 matching lines @@
       'toSet',
       'iterator',
       'isEmpty',
       'length',
       'first',
       'last',
       'single'
     ]);
     return EmptyIterable;
   });
-  let EmptyIterable = EmptyIterable$();
+  const EmptyIterable = EmptyIterable$();
   const EmptyIterator$ = dart.generic(function(E) {
     class EmptyIterator extends core.Object {
       EmptyIterator() {
       }
       moveNext() {
         return false;
       }
       get current() {
         return null;
       }
     }
     EmptyIterator[dart.implements] = () => [core.Iterator$(E)];
     dart.setSignature(EmptyIterator, {
       constructors: () => ({EmptyIterator: [EmptyIterator$(E), []]}),
       methods: () => ({moveNext: [core.bool, []]})
     });
     return EmptyIterator;
   });
-  let EmptyIterator = EmptyIterator$();
+  const EmptyIterator = EmptyIterator$();
   const BidirectionalIterator$ = dart.generic(function(T) {
     class BidirectionalIterator extends core.Object {}
     BidirectionalIterator[dart.implements] = () => [core.Iterator$(T)];
     return BidirectionalIterator;
   });
-  let BidirectionalIterator = BidirectionalIterator$();
+  const BidirectionalIterator = BidirectionalIterator$();
   const IterableMixinWorkaround$ = dart.generic(function(T) {
     class IterableMixinWorkaround extends core.Object {
       static contains(iterable, element) {
         for (let e of iterable) {
           if (dart.equals(e, element)) return true;
         }
         return false;
       }
       static forEach(iterable, f) {
         dart.as(f, dart.functionType(dart.void, [dart.dynamic]));
@@ skipping 388 matching lines @@
         setAllList: [dart.void, [core.List, core.int, core.Iterable]],
         setContainsAll: [core.bool, [core.Set, core.Iterable]],
         setIntersection: [core.Set, [core.Set, core.Set, core.Set]],
         setUnion: [core.Set, [core.Set, core.Set, core.Set]],
         setDifference: [core.Set, [core.Set, core.Set, core.Set]]
       }),
       names: ['contains', 'forEach', 'any', 'every', 'reduce', 'fold', 'removeWhereList', 'isEmpty', 'first', 'last', 'single', 'firstWhere', 'lastWhere', 'lastWhereList', 'singleWhere', 'elementAt', 'join', 'joinList', 'map', 'mapList', 'expand', 'sortList', 'shuffleList', 'indexOfList', 'lastIndexOfList', '_rangeCheck', 'setRangeList', 'replaceRangeList', 'fillRangeList', 'insertAllList', 'setAllList', 'setContainsAll', 'setIntersection', 'setUnion', 'setDifference']
     });
     return IterableMixinWorkaround;
   });
-  let IterableMixinWorkaround = IterableMixinWorkaround$();
+  const IterableMixinWorkaround = IterableMixinWorkaround$();
   class IterableElementError extends core.Object {
     static noElement() {
       return new core.StateError("No element");
     }
     static tooMany() {
       return new core.StateError("Too many elements");
     }
     static tooFew() {
       return new core.StateError("Too few elements");
     }
   }
   dart.setSignature(IterableElementError, {
     statics: () => ({
       noElement: [core.StateError, []],
       tooMany: [core.StateError, []],
       tooFew: [core.StateError, []]
     }),
     names: ['noElement', 'tooMany', 'tooFew']
   });
   const __CastType0$ = dart.generic(function(S, T) {
     const __CastType0 = dart.typedef('__CastType0', () => dart.functionType(core.Iterable$(T), [S]));
     return __CastType0;
   });
-  let __CastType0 = __CastType0$();
+  const __CastType0 = __CastType0$();
   const __CastType2$ = dart.generic(function(T) {
     const __CastType2 = dart.typedef('__CastType2', () => dart.functionType(core.bool, [T]));
     return __CastType2;
   });
-  let __CastType2 = __CastType2$();
+  const __CastType2 = __CastType2$();
   const FixedLengthListMixin$ = dart.generic(function(E) {
     class FixedLengthListMixin extends core.Object {
       set length(newLength) {
         dart.throw(new core.UnsupportedError("Cannot change the length of a fixed-length list"));
       }
       add(value) {
         dart.as(value, E);
         dart.throw(new core.UnsupportedError("Cannot add to a fixed-length list"));
       }
       insert(index, value) {
@@ skipping 47 matching lines @@
         retainWhere: [dart.void, [dart.functionType(core.bool, [E])]],
         clear: [dart.void, []],
         removeAt: [E, [core.int]],
         removeLast: [E, []],
         removeRange: [dart.void, [core.int, core.int]],
         replaceRange: [dart.void, [core.int, core.int, core.Iterable$(E)]]
       })
     });
     return FixedLengthListMixin;
   });
-  let FixedLengthListMixin = FixedLengthListMixin$();
+  const FixedLengthListMixin = FixedLengthListMixin$();
   const UnmodifiableListMixin$ = dart.generic(function(E) {
     class UnmodifiableListMixin extends core.Object {
       set(index, value) {
         dart.as(value, E);
         dart.throw(new core.UnsupportedError("Cannot modify an unmodifiable list"));
         return value;
       }
       set length(newLength) {
         dart.throw(new core.UnsupportedError("Cannot change the length of an unmodifiable list"));
       }
@@ skipping 103 matching lines @@
       'removeAt',
       'removeLast',
       'setRange',
       'removeRange',
       'replaceRange',
       'fillRange',
       'length'
     ]);
     return UnmodifiableListMixin;
   });
-  let UnmodifiableListMixin = UnmodifiableListMixin$();
+  const UnmodifiableListMixin = UnmodifiableListMixin$();
   const FixedLengthListBase$ = dart.generic(function(E) {
     class FixedLengthListBase extends dart.mixin(collection.ListBase$(E), FixedLengthListMixin$(E)) {
       FixedLengthListBase() {
         super.ListBase(...arguments);
       }
     }
     return FixedLengthListBase;
   });
-  let FixedLengthListBase = FixedLengthListBase$();
+  const FixedLengthListBase = FixedLengthListBase$();
   const UnmodifiableListBase$ = dart.generic(function(E) {
     class UnmodifiableListBase extends dart.mixin(collection.ListBase$(E), UnmodifiableListMixin$(E)) {
       UnmodifiableListBase() {
         super.ListBase(...arguments);
       }
     }
     return UnmodifiableListBase;
   });
-  let UnmodifiableListBase = UnmodifiableListBase$();
+  const UnmodifiableListBase = UnmodifiableListBase$();
   const _backedList = dart.JsSymbol('_backedList');
   class _ListIndicesIterable extends ListIterable$(core.int) {
     _ListIndicesIterable(backedList) {
       this[_backedList] = backedList;
       super.ListIterable();
     }
     get length() {
       return this[_backedList][dartx.length];
     }
     elementAt(index) {
@@ skipping 79 matching lines @@
         forEach: [dart.void, [dart.functionType(dart.void, [core.int, E])]],
         set: [dart.void, [core.int, E]],
         putIfAbsent: [E, [core.int, dart.functionType(E, [])]],
         remove: [E, [core.Object]],
         clear: [dart.void, []],
         addAll: [dart.void, [core.Map$(core.int, E)]]
       })
     });
     return ListMapView;
   });
-  let ListMapView = ListMapView$();
+  const ListMapView = ListMapView$();
   const ReversedListIterable$ = dart.generic(function(E) {
     class ReversedListIterable extends ListIterable$(E) {
       ReversedListIterable(source) {
         this[_source] = source;
         super.ListIterable();
       }
       get length() {
         return this[_source][dartx.length];
       }
       elementAt(index) {
         return this[_source][dartx.elementAt](dart.notNull(this[_source][dartx.length]) - 1 - dart.notNull(index));
       }
     }
     dart.setSignature(ReversedListIterable, {
       constructors: () => ({ReversedListIterable: [ReversedListIterable$(E), [core.Iterable$(E)]]}),
       methods: () => ({elementAt: [E, [core.int]]})
     });
     dart.defineExtensionMembers(ReversedListIterable, ['elementAt', 'length']);
     return ReversedListIterable;
   });
-  let ReversedListIterable = ReversedListIterable$();
+  const ReversedListIterable = ReversedListIterable$();
   class UnmodifiableListError extends core.Object {
     static add() {
       return new core.UnsupportedError("Cannot add to unmodifiable List");
     }
     static change() {
       return new core.UnsupportedError("Cannot change the content of an unmodifiable List");
     }
     static length() {
       return new core.UnsupportedError("Cannot change length of unmodifiable List");
     }
@@ skipping 510 matching lines @@
   exports.ReversedListIterable = ReversedListIterable;
   exports.UnmodifiableListError = UnmodifiableListError;
   exports.NonGrowableListError = NonGrowableListError;
   exports.makeListFixedLength = makeListFixedLength;
   exports.Lists = Lists;
   exports.printToConsole = printToConsole;
   exports.Sort = Sort;
   exports.Symbol = Symbol;
   exports.POWERS_OF_TEN = POWERS_OF_TEN;
 });