Revert shared dart2js messages.

pkg/compiler/lib/src/diagnostics/dart2js_messages.dart

-// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// The messages in this file should meet the following guide lines:
-//
-// 1. The message should be a complete sentence starting with an uppercase
-// letter, and ending with a period.
-//
-// 2. Reserved words and embedded identifiers should be in single quotes, so
-// prefer double quotes for the complete message. For example, "The
-// class '#{className}' can't use 'super'." Notice that the word 'class' in the
-// preceding message is not quoted as it refers to the concept 'class', not the
-// reserved word. On the other hand, 'super' refers to the reserved word. Do
-// not quote 'null' and numeric literals.
-//
-// 3. Do not try to compose messages, as it can make translating them hard.
-//
-// 4. Try to keep the error messages short, but informative.
-//
-// 5. Use simple words and terminology, assume the reader of the message
-// doesn't have an advanced degree in math, and that English is not the
-// reader's native language. Do not assume any formal computer science
-// training. For example, do not use Latin abbreviations (prefer "that is" over
-// "i.e.", and "for example" over "e.g."). Also avoid phrases such as "if and
-// only if" and "iff", that level of precision is unnecessary.
-//
-// 6. Prefer contractions when they are in common use, for example, prefer
-// "can't" over "cannot". Using "cannot", "must not", "shall not", etc. is
-// off-putting to people new to programming.
-//
-// 7. Use common terminology, preferably from the Dart Language
-// Specification. This increases the user's chance of finding a good
-// explanation on the web.
-//
-// 8. Do not try to be cute or funny. It is extremely frustrating to work on a
-// product that crashes with a "tongue-in-cheek" message, especially if you did
-// not want to use this product to begin with.
-//
-// 9. Do not lie, that is, do not write error messages containing phrases like
-// "can't happen".  If the user ever saw this message, it would be a
-// lie. Prefer messages like: "Internal error: This function should not be
-// called when 'x' is null.".
-//
-// 10. Prefer to not use imperative tone. That is, the message should not sound
-// accusing or like it is ordering the user around. The computer should
-// describe the problem, not criticize for violating the specification.
-//
-// Other things to keep in mind:
-//
-// An INFO message should always be preceded by a non-INFO message, and the
-// INFO messages are additional details about the preceding non-INFO
-// message. For example, consider duplicated elements. First report a WARNING
-// or ERROR about the duplicated element, and then report an INFO about the
-// location of the existing element.
-//
-// Generally, we want to provide messages that consists of three sentences:
-// 1. what is wrong, 2. why is it wrong, 3. how do I fix it. However, we
-// combine the first two in [template] and the last in [howToFix].
-
-/// Padding used before and between import chains in the message for
-/// [MessageKind.IMPORT_EXPERIMENTAL_MIRRORS].
-const String IMPORT_EXPERIMENTAL_MIRRORS_PADDING = '\n*   ';
-
-/// Padding used before and between import chains in the message for
-/// [MessageKind.MIRRORS_LIBRARY_NOT_SUPPORT_BY_BACKEND].
-const String MIRRORS_NOT_SUPPORTED_BY_BACKEND_PADDING = '\n   ';
-
-/// Padding used before and between import chains in the message for
-/// [MessageKind.DISALLOWED_LIBRARY_IMPORT].
-const String DISALLOWED_LIBRARY_IMPORT_PADDING = '\n  ';
-
-const DONT_KNOW_HOW_TO_FIX = "Computer says no!";
-
-final Map<String, Map> MESSAGES = {
-  /// Do not use this. It is here for legacy and debugging. It violates item
-  /// 4 of the guide lines for error messages in the beginning of the file.
-  'GENERIC': {'id': 'SOWPSL', 'template': "#{text}",},
-
-  'NOT_ASSIGNABLE': {
-    'id': 'VYNMAP',
-    'template': "'#{fromType}' is not assignable to '#{toType}'.",
-  },
-
-  'FORIN_NOT_ASSIGNABLE': {
-    'id': 'XQSRXO',
-    'template': "The element type '#{currentType}' of '#{expressionType}' "
-        "is not assignable to '#{elementType}'.",
-  },
-
-  'VOID_EXPRESSION': {
-    'id': 'QHEVSC',
-    'template': "Expression does not yield a value.",
-  },
-
-  'VOID_VARIABLE': {
-    'id': 'RFEURK',
-    'template': "Variable cannot be of type void.",
-  },
-
-  'RETURN_VALUE_IN_VOID': {
-    'id': 'FUNYDS',
-    'template': "Cannot return value from void function.",
-  },
-
-  'RETURN_NOTHING': {
-    'id': 'HPPODJ',
-    'template': "Value of type '#{returnType}' expected.",
-  },
-
-  'MISSING_ARGUMENT': {
-    'id': 'LHMCIK',
-    'template': "Missing argument of type '#{argumentType}'.",
-  },
-
-  'ADDITIONAL_ARGUMENT': {'id': 'GMITMA', 'template': "Additional argument.",},
-
-  'NAMED_ARGUMENT_NOT_FOUND': {
-    'id': 'UCEARQ',
-    'template': "No named argument '#{argumentName}' found on method.",
-  },
-
-  'MEMBER_NOT_FOUND': {
-    'id': 'MMQODC',
-    'template': "No member named '#{memberName}' in class '#{className}'.",
-  },
-
-  'AWAIT_MEMBER_NOT_FOUND': {
-    'id': 'XIDLIP',
-    'template': "No member named 'await' in class '#{className}'.",
-    'howToFix': "Did you mean to add the 'async' marker "
-        "to '#{functionName}'?",
-    'examples': [
-      """
-class A {
-m() => await -3;
-}
-main() => new A().m();
-"""
-    ],
-  },
-
-  'AWAIT_MEMBER_NOT_FOUND_IN_CLOSURE': {
-    'id': 'HBIYGN',
-    'template': "No member named 'await' in class '#{className}'.",
-    'howToFix': "Did you mean to add the 'async' marker "
-        "to the enclosing function?",
-    'examples': [
-      """
-class A {
-m() => () => await -3;
-}
-main() => new A().m();
-"""
-    ],
-  },
-
-  'METHOD_NOT_FOUND': {
-    'id': 'QYYHBU',
-    'template': "No method named '#{memberName}' in class '#{className}'.",
-  },
-
-  'OPERATOR_NOT_FOUND': {
-    'id': 'SXGOYS',
-    'template': "No operator '#{memberName}' in class '#{className}'.",
-  },
-
-  'SETTER_NOT_FOUND': {
-    'id': 'ADFRVF',
-    'template': "No setter named '#{memberName}' in class '#{className}'.",
-  },
-
-  'SETTER_NOT_FOUND_IN_SUPER': {
-    'id': 'OCVRNJ',
-    'template': "No setter named '#{name}' in superclass of '#{className}'.",
-  },
-
-  'GETTER_NOT_FOUND': {
-    'id': 'PBNXAC',
-    'template': "No getter named '#{memberName}' in class '#{className}'.",
-  },
-
-  'NOT_CALLABLE': {
-    'id': 'SEMKJO',
-    'template': "'#{elementName}' is not callable.",
-  },
-
-  'MEMBER_NOT_STATIC': {
-    'id': 'QIOISX',
-    'template': "'#{className}.#{memberName}' is not static.",
-  },
-
-  'NO_INSTANCE_AVAILABLE': {
-    'id': 'FQPYLR',
-    'template': "'#{name}' is only available in instance methods.",
-  },
-
-  'NO_THIS_AVAILABLE': {
-    'id': 'LXPXKG',
-    'template': "'this' is only available in instance methods.",
-  },
-
-  'PRIVATE_ACCESS': {
-    'id': 'DIMHCR',
-    'template': "'#{name}' is declared private within library "
-        "'#{libraryName}'.",
-  },
-
-  'THIS_IS_THE_DECLARATION': {
-    'id': 'YIJWTO',
-    'template': "This is the declaration of '#{name}'.",
-  },
-
-  'THIS_IS_THE_METHOD': {
-    'id': 'PYXWLF',
-    'template': "This is the method declaration.",
-  },
-
-  'CANNOT_RESOLVE': {'id': 'SPVJYO', 'template': "Cannot resolve '#{name}'.",},
-
-  'CANNOT_RESOLVE_AWAIT': {
-    'id': 'YQYLRS',
-    'template': "Cannot resolve '#{name}'.",
-    'howToFix': "Did you mean to add the 'async' marker "
-        "to '#{functionName}'?",
-    'examples': ["main() => await -3;", "foo() => await -3; main() => foo();"],
-  },
-
-  'CANNOT_RESOLVE_AWAIT_IN_CLOSURE': {
-    'id': 'SIXRAA',
-    'template': "Cannot resolve '#{name}'.",
-    'howToFix': "Did you mean to add the 'async' marker "
-        "to the enclosing function?",
-    'examples': ["main() { (() => await -3)(); }",],
-  },
-
-  'CANNOT_RESOLVE_IN_INITIALIZER': {
-    'id': 'VVEQFD',
-    'template':
-        "Cannot resolve '#{name}'. It would be implicitly looked up on this "
-        "instance, but instances are not available in initializers.",
-    'howToFix': "Try correcting the unresolved reference or move the "
-        "initialization to a constructor body.",
-    'examples': [
-      """
-class A {
-var test = unresolvedName;
-}
-main() => new A();
-"""
-    ],
-  },
-
-  'CANNOT_RESOLVE_CONSTRUCTOR': {
-    'id': 'QRPATN',
-    'template': "Cannot resolve constructor '#{constructorName}'.",
-  },
-
-  'CANNOT_RESOLVE_CONSTRUCTOR_FOR_IMPLICIT': {
-    'id': 'IFKCHF',
-    'template': "cannot resolve constructor '#{constructorName}' "
-        "for implicit super call.",
-    'howToFix': "Try explicitly invoking a constructor of the super class",
-    'examples': [
-      """
-class A {
-A.foo() {}
-}
-class B extends A {
-B();
-}
-main() => new B();
-"""
-    ],
-  },
-
-  'INVALID_UNNAMED_CONSTRUCTOR_NAME': {
-    'id': 'VPJLVI',
-    'template': "Unnamed constructor name must be '#{name}'.",
-  },
-
-  'INVALID_CONSTRUCTOR_NAME': {
-    'id': 'LMDCAS',
-    'template': "Constructor name must start with '#{name}'.",
-  },
-
-  'CANNOT_RESOLVE_TYPE': {
-    'id': 'PQIAPG',
-    'template': "Cannot resolve type '#{typeName}'.",
-  },
-
-  'DUPLICATE_DEFINITION': {
-    'id': 'LVTYNW',
-    'template': "Duplicate definition of '#{name}'.",
-    'howToFix': "Try to rename or remove this definition.",
-    'examples': [
-      """
-class C {
-void f() {}
-int get f => 1;
-}
-
-main() {
-new C();
-}
-
-"""
-    ],
-  },
-
-  'EXISTING_DEFINITION': {
-    'id': 'DAUYKK',
-    'template': "Existing definition of '#{name}'.",
-  },
-
-  'DUPLICATE_IMPORT': {
-    'id': 'KYJFJN',
-    'template': "Duplicate import of '#{name}'.",
-  },
-
-  'HIDDEN_IMPORT': {
-    'id': 'ACRDPR',
-    'template': "'#{name}' from library '#{hiddenUri}' is hidden by '#{name}' "
-        "from library '#{hidingUri}'.",
-    'howToFix': "Try adding 'hide #{name}' to the import of '#{hiddenUri}'.",
-    'examples': [
-      {
-        'main.dart': """
-import 'dart:async'; // This imports a class Future.
-import 'future.dart';
-
-void main() => new Future();""",
-        'future.dart': """
-library future;
-
-class Future {}"""
-      },
-      {
-        'main.dart': """
-import 'future.dart';
-import 'dart:async'; // This imports a class Future.
-
-void main() => new Future();""",
-        'future.dart': """
-library future;
-
-class Future {}"""
-      },
-      {
-        'main.dart': """
-import 'export.dart';
-import 'dart:async'; // This imports a class Future.
-
-void main() => new Future();""",
-        'future.dart': """
-library future;
-
-class Future {}""",
-        'export.dart': """
-library export;
-
-export 'future.dart';"""
-      },
-      {
-        'main.dart': """
-import 'future.dart' as prefix;
-import 'dart:async' as prefix; // This imports a class Future.
-
-void main() => new prefix.Future();""",
-        'future.dart': """
-library future;
-
-class Future {}"""
-      }
-    ],
-  },
-
-  'HIDDEN_IMPLICIT_IMPORT': {
-    'id': 'WDNFSI',
-    'template': "'#{name}' from library '#{hiddenUri}' is hidden by '#{name}' "
-        "from library '#{hidingUri}'.",
-    'howToFix': "Try adding an explicit "
-        "'import \"#{hiddenUri}\" hide #{name}'.",
-    'examples': [
-      {
-        'main.dart': """
-// This hides the implicit import of class Type from dart:core.
-import 'type.dart';
-
-void main() => new Type();""",
-        'type.dart': """
-library type;
-
-class Type {}"""
-      },
-      {
-        'conflictsWithDart.dart': """
-library conflictsWithDart;
-
-class Duration {
-static var x = 100;
-}
-""",
-        'conflictsWithDartAsWell.dart': """
-library conflictsWithDartAsWell;
-
-class Duration {
-static var x = 100;
-}
-""",
-        'main.dart': r"""
-library testDartConflicts;
-
-import 'conflictsWithDart.dart';
-import 'conflictsWithDartAsWell.dart';
-
-main() {
-print("Hail Caesar ${Duration.x}");
-}
-"""
-      }
-    ],
-  },
-
-  'DUPLICATE_EXPORT': {
-    'id': 'XGNOCL',
-    'template': "Duplicate export of '#{name}'.",
-    'howToFix': "Try adding 'hide #{name}' to one of the exports.",
-    'examples': [
-      {
-        'main.dart': """
-export 'decl1.dart';
-export 'decl2.dart';
-
-main() {}""",
-        'decl1.dart': "class Class {}",
-        'decl2.dart': "class Class {}"
-      }
-    ],
-  },
-
-  'DUPLICATE_EXPORT_CONT': {
-    'id': 'BDROED',
-    'template': "This is another export of '#{name}'.",
-  },
-
-  'DUPLICATE_EXPORT_DECL': {
-    'id': 'GFFLMA',
-    'template':
-        "The exported '#{name}' from export #{uriString} is defined here.",
-  },
-
-  'EMPTY_HIDE': {
-    'id': 'ODFAOC',
-    'template': "Library '#{uri}' doesn't export a '#{name}' declaration.",
-    'howToFix': "Try removing '#{name}' the 'hide' clause.",
-    'examples': [
-      {
-        'main.dart': """
-import 'dart:core' hide Foo;
-
-main() {}"""
-      },
-      {
-        'main.dart': """
-export 'dart:core' hide Foo;
-
-main() {}"""
-      },
-    ],
-  },
-
-  'EMPTY_SHOW': {
-    'id': 'EXONIK',
-    'template': "Library '#{uri}' doesn't export a '#{name}' declaration.",
-    'howToFix': "Try removing '#{name}' from the 'show' clause.",
-    'examples': [
-      {
-        'main.dart': """
-import 'dart:core' show Foo;
-
-main() {}"""
-      },
-      {
-        'main.dart': """
-export 'dart:core' show Foo;
-
-main() {}"""
-      },
-    ],
-  },
-
-  'NOT_A_TYPE': {'id': 'CTTAXD', 'template': "'#{node}' is not a type.",},
-
-  'NOT_A_PREFIX': {'id': 'LKEUMI', 'template': "'#{node}' is not a prefix.",},
-
-  'PREFIX_AS_EXPRESSION': {
-    'id': 'CYIMBJ',
-    'template': "Library prefix '#{prefix}' is not a valid expression.",
-  },
-
-  'CANNOT_FIND_CONSTRUCTOR': {
-    'id': 'DROVNH',
-    'template': "Cannot find constructor '#{constructorName}' in class "
-        "'#{className}'.",
-  },
-
-  'CANNOT_FIND_UNNAMED_CONSTRUCTOR': {
-    'id': 'GDCTGB',
-    'template': "Cannot find unnamed constructor in class "
-        "'#{className}'.",
-  },
-
-  'CYCLIC_CLASS_HIERARCHY': {
-    'id': 'HKFYOA',
-    'template': "'#{className}' creates a cycle in the class hierarchy.",
-  },
-
-  'CYCLIC_REDIRECTING_FACTORY': {
-    'id': 'QGETJC',
-    'template': "Redirecting factory leads to a cyclic redirection.",
-  },
-
-  'INVALID_RECEIVER_IN_INITIALIZER': {
-    'id': 'SYUTHA',
-    'template': "Field initializer expected.",
-  },
-
-  'NO_SUPER_IN_STATIC': {
-    'id': 'HSCESG',
-    'template': "'super' is only available in instance methods.",
-  },
-
-  'DUPLICATE_INITIALIZER': {
-    'id': 'GKVFEP',
-    'template': "Field '#{fieldName}' is initialized more than once.",
-  },
-
-  'ALREADY_INITIALIZED': {
-    'id': 'NCRMVD',
-    'template': "'#{fieldName}' was already initialized here.",
-  },
-
-  'INIT_STATIC_FIELD': {
-    'id': 'DBSRHA',
-    'template': "Cannot initialize static field '#{fieldName}'.",
-  },
-
-  'NOT_A_FIELD': {
-    'id': 'FYEPLC',
-    'template': "'#{fieldName}' is not a field.",
-  },
-
-  'CONSTRUCTOR_CALL_EXPECTED': {
-    'id': 'GEJCDX',
-    'template': "only call to 'this' or 'super' constructor allowed.",
-  },
-
-  'INVALID_FOR_IN': {
-    'id': 'AUQJBG',
-    'template': "Invalid for-in variable declaration.",
-  },
-
-  'INVALID_INITIALIZER': {'id': 'JKUKSA', 'template': "Invalid initializer.",},
-
-  'FUNCTION_WITH_INITIALIZER': {
-    'id': 'BNRDDK',
-    'template': "Only constructors can have initializers.",
-  },
-
-  'REDIRECTING_CONSTRUCTOR_CYCLE': {
-    'id': 'CQTMEP',
-    'template': "Cyclic constructor redirection.",
-  },
-
-  'REDIRECTING_CONSTRUCTOR_HAS_BODY': {
-    'id': 'WXJQNE',
-    'template': "Redirecting constructor can't have a body.",
-  },
-
-  'CONST_CONSTRUCTOR_HAS_BODY': {
-    'id': 'GNEFQG',
-    'template': "Const constructor or factory can't have a body.",
-    'howToFix': "Remove the 'const' keyword or the body",
-    'examples': [
-      """
-class C {
-const C() {}
-}
-
-main() => new C();"""
-    ],
-  },
-
-  'REDIRECTING_CONSTRUCTOR_HAS_INITIALIZER': {
-    'id': 'NUIDSF',
-    'template': "Redirecting constructor cannot have other initializers.",
-  },
-
-  'SUPER_INITIALIZER_IN_OBJECT': {
-    'id': 'DXYGND',
-    'template': "'Object' cannot have a super initializer.",
-  },
-
-  'DUPLICATE_SUPER_INITIALIZER': {
-    'id': 'FFKOWP',
-    'template': "Cannot have more than one super initializer.",
-  },
-
-  'SUPER_CALL_TO_FACTORY': {
-    'id': 'YTOWGV',
-    'template': "The target of the superinitializer must be a generative "
-        "constructor.",
-    'howToFix': "Try calling another constructor on the superclass.",
-    'examples': [
-      """
-class Super {
-factory Super() => null;
-}
-class Class extends Super {}
-main() => new Class();
-""",
-      """
-class Super {
-factory Super() => null;
-}
-class Class extends Super {
-Class();
-}
-main() => new Class();
-""",
-      """
-class Super {
-factory Super() => null;
-}
-class Class extends Super {
-Class() : super();
-}
-main() => new Class();
-""",
-      """
-class Super {
-factory Super.foo() => null;
-}
-class Class extends Super {
-Class() : super.foo();
-}
-main() => new Class();
-"""
-    ],
-  },
-
-  'THIS_CALL_TO_FACTORY': {
-    'id': 'JLATDB',
-    'template': "The target of the redirection clause must be a generative "
-        "constructor",
-    'howToFix': "Try redirecting to another constructor.",
-    'examples': [
-      """
-class Class {
-factory Class() => null;
-Class.foo() : this();
-}
-main() => new Class.foo();
-""",
-      """
-class Class {
-factory Class.foo() => null;
-Class() : this.foo();
-}
-main() => new Class();
-"""
-    ],
-  },
-
-  'INVALID_CONSTRUCTOR_ARGUMENTS': {
-    'id': 'WVPLKL',
-    'template': "Arguments do not match the expected parameters of constructor "
-        "'#{constructorName}'.",
-  },
-
-  'NO_MATCHING_CONSTRUCTOR': {
-    'id': 'OJQQLE',
-    'template':
-        "'super' call arguments and constructor parameters do not match.",
-  },
-
-  'NO_MATCHING_CONSTRUCTOR_FOR_IMPLICIT': {
-    'id': 'WHCVID',
-    'template': "Implicit 'super' call arguments and constructor parameters "
-        "do not match.",
-  },
-
-  'CONST_CALLS_NON_CONST': {
-    'id': 'CQFHXC',
-    'template': "'const' constructor cannot call a non-const constructor.",
-  },
-
-  'CONST_CALLS_NON_CONST_FOR_IMPLICIT': {
-    'id': 'SFCEXS',
-    'template': "'const' constructor cannot call a non-const constructor. "
-        "This constructor has an implicit call to a "
-        "super non-const constructor.",
-    'howToFix': "Try making the super constructor const.",
-    'examples': [
-      """
-class C {
-C(); // missing const
-}
-class D extends C {
-final d;
-const D(this.d);
-}
-main() => new D(0);"""
-    ],
-  },
-
-  'CONST_CONSTRUCTOR_WITH_NONFINAL_FIELDS': {
-    'id': 'XBHUDL',
-    'template': "Can't declare constructor 'const' on class #{className} "
-        "because the class contains non-final instance fields.",
-    'howToFix': "Try making all fields final.",
-    'examples': [
-      """
-class C {
-// 'a' must be declared final to allow for the const constructor.
-var a;
-const C(this.a);
-}
-
-main() => new C(0);"""
-    ],
-  },
-
-  'CONST_CONSTRUCTOR_WITH_NONFINAL_FIELDS_FIELD': {
-    'id': 'YYAHVD',
-    'template': "This non-final field prevents using const constructors.",
-  },
-
-  'CONST_CONSTRUCTOR_WITH_NONFINAL_FIELDS_CONSTRUCTOR': {
-    'id': 'FROWJB',
-    'template': "This const constructor is not allowed due to "
-        "non-final fields.",
-  },
-
-  'INITIALIZING_FORMAL_NOT_ALLOWED': {
-    'id': 'YIPXYP',
-    'template': "Initializing formal parameter only allowed in generative "
-        "constructor.",
-  },
-
-  'INVALID_PARAMETER': {
-    'id': 'OWWLIX',
-    'template': "Cannot resolve parameter.",
-  },
-
-  'NOT_INSTANCE_FIELD': {
-    'id': 'VSPKMU',
-    'template': "'#{fieldName}' is not an instance field.",
-  },
-
-  'THIS_PROPERTY': {'id': 'MWFIGH', 'template': "Expected an identifier.",},
-
-  'NO_CATCH_NOR_FINALLY': {
-    'id': 'OPJXPP',
-    'template': "Expected 'catch' or 'finally'.",
-  },
-
-  'EMPTY_CATCH_DECLARATION': {
-    'id': 'UNHCPY',
-    'template': "Expected an identifier in catch declaration.",
-  },
-
-  'EXTRA_CATCH_DECLARATION': {
-    'id': 'YGGRAK',
-    'template': "Extra parameter in catch declaration.",
-  },
-
-  'PARAMETER_WITH_TYPE_IN_CATCH': {
-    'id': 'EXQVDU',
-    'template': "Cannot use type annotations in catch.",
-  },
-
-  'PARAMETER_WITH_MODIFIER_IN_CATCH': {
-    'id': 'BQLKRF',
-    'template': "Cannot use modifiers in catch.",
-  },
-
-  'OPTIONAL_PARAMETER_IN_CATCH': {
-    'id': 'DAICPP',
-    'template': "Cannot use optional parameters in catch.",
-  },
-
-  'THROW_WITHOUT_EXPRESSION': {
-    'id': 'YHACYV',
-    'template': "Cannot use re-throw outside of catch block "
-        "(expression expected after 'throw').",
-  },
-
-  'UNBOUND_LABEL': {
-    'id': 'GLDXHY',
-    'template': "Cannot resolve label '#{labelName}'.",
-  },
-
-  'NO_BREAK_TARGET': {
-    'id': 'VBXXBE',
-    'template': "'break' statement not inside switch or loop.",
-  },
-
-  'NO_CONTINUE_TARGET': {
-    'id': 'JTTHHM',
-    'template': "'continue' statement not inside loop.",
-  },
-
-  'EXISTING_LABEL': {
-    'id': 'AHCSXF',
-    'template': "Original declaration of duplicate label '#{labelName}'.",
-  },
-
-  'DUPLICATE_LABEL': {
-    'id': 'HPULLI',
-    'template': "Duplicate declaration of label '#{labelName}'.",
-  },
-
-  'UNUSED_LABEL': {'id': 'KFREJO', 'template': "Unused label '#{labelName}'.",},
-
-  'INVALID_CONTINUE': {
-    'id': 'DSKTPX',
-    'template': "Target of continue is not a loop or switch case.",
-  },
-
-  'INVALID_BREAK': {
-    'id': 'MFCCWX',
-    'template': "Target of break is not a statement.",
-  },
-
-  'DUPLICATE_TYPE_VARIABLE_NAME': {
-    'id': 'BAYCCM',
-    'template': "Type variable '#{typeVariableName}' already declared.",
-  },
-
-  'TYPE_VARIABLE_WITHIN_STATIC_MEMBER': {
-    'id': 'XQLXRL',
-    'template': "Cannot refer to type variable '#{typeVariableName}' "
-        "within a static member.",
-  },
-
-  'TYPE_VARIABLE_IN_CONSTANT': {
-    'id': 'ANDEVG',
-    'template': "Constant expressions can't refer to type variables.",
-    'howToFix': "Try removing the type variable or replacing it with a "
-        "concrete type.",
-    'examples': [
-      """
-class C<T> {
-const C();
-
-m(T t) => const C<T>();
-}
-
-void main() => new C().m(null);
-"""
-    ],
-  },
-
-  'INVALID_TYPE_VARIABLE_BOUND': {
-    'id': 'WQAEDK',
-    'template': "'#{typeArgument}' is not a subtype of bound '#{bound}' for "
-        "type variable '#{typeVariable}' of type '#{thisType}'.",
-    'howToFix': "Try to change or remove the type argument.",
-    'examples': [
-      """
-class C<T extends num> {}
-
-// 'String' is not a valid instantiation of T with bound num.'.
-main() => new C<String>();
-"""
-    ],
-  },
-
-  'INVALID_USE_OF_SUPER': {
-    'id': 'JKYYSN',
-    'template': "'super' not allowed here.",
-  },
-
-  'INVALID_CASE_DEFAULT': {
-    'id': 'ABSPBM',
-    'template': "'default' only allowed on last case of a switch.",
-  },
-
-  'SWITCH_CASE_TYPES_NOT_EQUAL': {
-    'id': 'UFQPBC',
-    'template': "'case' expressions do not all have type '#{type}'.",
-  },
-
-  'SWITCH_CASE_TYPES_NOT_EQUAL_CASE': {
-    'id': 'RDMVAC',
-    'template': "'case' expression of type '#{type}'.",
-  },
-
-  'SWITCH_CASE_FORBIDDEN': {
-    'id': 'UHSCSU',
-    'template': "'case' expression may not be of type '#{type}'.",
-  },
-
-  'SWITCH_CASE_VALUE_OVERRIDES_EQUALS': {
-    'id': 'NRTWXL',
-    'template': "'case' expression type '#{type}' overrides 'operator =='.",
-  },
-
-  'INVALID_ARGUMENT_AFTER_NAMED': {
-    'id': 'WAJURC',
-    'template': "Unnamed argument after named argument.",
-  },
-
-  'NOT_A_COMPILE_TIME_CONSTANT': {
-    'id': 'SBCHWL',
-    'template': "Not a compile-time constant.",
-  },
-
-  'DEFERRED_COMPILE_TIME_CONSTANT': {
-    'id': 'FHXTCK',
-    'template': "A deferred value cannot be used as a compile-time constant.",
-  },
-
-  'DEFERRED_COMPILE_TIME_CONSTANT_CONSTRUCTION': {
-    'id': 'TSBXLG',
-    'template': "A deferred class cannot be used to create a "
-        "compile-time constant.",
-  },
-
-  'CYCLIC_COMPILE_TIME_CONSTANTS': {
-    'id': 'JJWJYE',
-    'template': "Cycle in the compile-time constant computation.",
-  },
-
-  'CONSTRUCTOR_IS_NOT_CONST': {
-    'id': 'DOJCUX',
-    'template': "Constructor is not a 'const' constructor.",
-  },
-
-  'CONST_MAP_KEY_OVERRIDES_EQUALS': {
-    'id': 'VJNWEL',
-    'template': "Const-map key type '#{type}' overrides 'operator =='.",
-  },
-
-  'NO_SUCH_LIBRARY_MEMBER': {
-    'id': 'IOXVBA',
-    'template': "'#{libraryName}' has no member named '#{memberName}'.",
-  },
-
-  'CANNOT_INSTANTIATE_TYPEDEF': {
-    'id': 'KOYNMU',
-    'template': "Cannot instantiate typedef '#{typedefName}'.",
-  },
-
-  'REQUIRED_PARAMETER_WITH_DEFAULT': {
-    'id': 'CJWECI',
-    'template': "Non-optional parameters can't have a default value.",
-    'howToFix':
-        "Try removing the default value or making the parameter optional.",
-    'examples': [
-      """
-main() {
-foo(a: 1) => print(a);
-foo(2);
-}""",
-      """
-main() {
-foo(a = 1) => print(a);
-foo(2);
-}"""
-    ],
-  },
-
-  'NAMED_PARAMETER_WITH_EQUALS': {
-    'id': 'RPJDXD',
-    'template': "Named optional parameters can't use '=' to specify a default "
-        "value.",
-    'howToFix': "Try replacing '=' with ':'.",
-    'examples': [
-      """
-main() {
-foo({a = 1}) => print(a);
-foo(a: 2);
-}"""
-    ],
-  },
-
-  'POSITIONAL_PARAMETER_WITH_EQUALS': {
-    'id': 'JMSSDX',
-    'template': "Positional optional parameters can't use ':' to specify a "
-        "default value.",
-    'howToFix': "Try replacing ':' with '='.",
-    'examples': [
-      """
-main() {
-foo([a: 1]) => print(a);
-foo(2);
-}"""
-    ],
-  },
-
-  'TYPEDEF_FORMAL_WITH_DEFAULT': {
-    'id': 'NABHHS',
-    'template': "A parameter of a typedef can't specify a default value.",
-    'howToFix': "Try removing the default value.",
-    'examples': [
-      """
-typedef void F([int arg = 0]);
-
-main() {
-F f;
-}""",
-      """
-typedef void F({int arg: 0});
-
-main() {
-F f;
-}"""
-    ],
-  },
-
-  'FUNCTION_TYPE_FORMAL_WITH_DEFAULT': {
-    'id': 'APKYLU',
-    'template': "A function type parameter can't specify a default value.",
-    'howToFix': "Try removing the default value.",
-    'examples': [
-      """
-foo(f(int i, [a = 1])) {}
-
-main() {
-foo(1, 2);
-}""",
-      """
-foo(f(int i, {a: 1})) {}
-
-main() {
-foo(1, a: 2);
-}"""
-    ],
-  },
-
-  'REDIRECTING_FACTORY_WITH_DEFAULT': {
-    'id': 'AWSSEY',
-    'template':
-        "A parameter of a redirecting factory constructor can't specify a "
-        "default value.",
-    'howToFix': "Try removing the default value.",
-    'examples': [
-      """
-class A {
-A([a]);
-factory A.foo([a = 1]) = A;
-}
-
-main() {
-new A.foo(1);
-}""",
-      """
-class A {
-A({a});
-factory A.foo({a: 1}) = A;
-}
-
-main() {
-new A.foo(a: 1);
-}"""
-    ],
-  },
-
-  'FORMAL_DECLARED_CONST': {
-    'id': 'AVPRDK',
-    'template': "A formal parameter can't be declared const.",
-    'howToFix': "Try removing 'const'.",
-    'examples': [
-      """
-foo(const x) {}
-main() => foo(42);
-""",
-      """
-foo({const x}) {}
-main() => foo(42);
-""",
-      """
-foo([const x]) {}
-main() => foo(42);
-"""
-    ],
-  },
-
-  'FORMAL_DECLARED_STATIC': {
-    'id': 'PJKDMX',
-    'template': "A formal parameter can't be declared static.",
-    'howToFix': "Try removing 'static'.",
-    'examples': [
-      """
-foo(static x) {}
-main() => foo(42);
-""",
-      """
-foo({static x}) {}
-main() => foo(42);
-""",
-      """
-foo([static x]) {}
-main() => foo(42);
-"""
-    ],
-  },
-
-  'FINAL_FUNCTION_TYPE_PARAMETER': {
-    'id': 'JIOPIQ',
-    'template': "A function type parameter can't be declared final.",
-    'howToFix': "Try removing 'final'.",
-    'examples': [
-      """
-foo(final int x(int a)) {}
-main() => foo((y) => 42);
-""",
-      """
-foo({final int x(int a)}) {}
-main() => foo((y) => 42);
-""",
-      """
-foo([final int x(int a)]) {}
-main() => foo((y) => 42);
-"""
-    ],
-  },
-
-  'VAR_FUNCTION_TYPE_PARAMETER': {
-    'id': 'FOQOHK',
-    'template': "A function type parameter can't be declared with 'var'.",
-    'howToFix': "Try removing 'var'.",
-    'examples': [
-      """
-foo(var int x(int a)) {}
-main() => foo((y) => 42);
-""",
-      """
-foo({var int x(int a)}) {}
-main() => foo((y) => 42);
-""",
-      """
-foo([var int x(int a)]) {}
-main() => foo((y) => 42);
-"""
-    ],
-  },
-
-  'CANNOT_INSTANTIATE_TYPE_VARIABLE': {
-    'id': 'JAYHCH',
-    'template': "Cannot instantiate type variable '#{typeVariableName}'.",
-  },
-
-  'CYCLIC_TYPE_VARIABLE': {
-    'id': 'RQMPSO',
-    'template': "Type variable '#{typeVariableName}' is a supertype of itself.",
-  },
-
-  'CYCLIC_TYPEDEF': {
-    'id': 'VFERCQ',
-    'template': "A typedef can't refer to itself.",
-    'howToFix': "Try removing all references to '#{typedefName}' "
-        "in the definition of '#{typedefName}'.",
-    'examples': [
-      """
-typedef F F(); // The return type 'F' is a self-reference.
-main() { F f = null; }"""
-    ],
-  },
-
-  'CYCLIC_TYPEDEF_ONE': {
-    'id': 'ASWLWR',
-    'template': "A typedef can't refer to itself through another typedef.",
-    'howToFix': "Try removing all references to "
-        "'#{otherTypedefName}' in the definition of '#{typedefName}'.",
-    'examples': [
-      """
-typedef G F(); // The return type 'G' is a self-reference through typedef 'G'.
-typedef F G(); // The return type 'F' is a self-reference through typedef 'F'.
-main() { F f = null; }""",
-      """
-typedef G F(); // The return type 'G' creates a self-reference.
-typedef H G(); // The return type 'H' creates a self-reference.
-typedef H(F f); // The argument type 'F' creates a self-reference.
-main() { F f = null; }"""
-    ],
-  },
-
-  'CLASS_NAME_EXPECTED': {'id': 'DPKNHY', 'template': "Class name expected.",},
-
-  'CANNOT_EXTEND': {
-    'id': 'GCIQXD',
-    'template': "'#{type}' cannot be extended.",
-  },
-
-  'CANNOT_IMPLEMENT': {
-    'id': 'IBOQKV',
-    'template': "'#{type}' cannot be implemented.",
-  },
-
-  // TODO(johnnwinther): Split messages into reasons for malformedness.
-  'CANNOT_EXTEND_MALFORMED': {
-    'id': 'YPFJBD',
-    'template': "Class '#{className}' can't extend the type '#{malformedType}' "
-        "because it is malformed.",
-    'howToFix': "Try correcting the malformed type annotation or removing the "
-        "'extends' clause.",
-    'examples': [
-      """
-class A extends Malformed {}
-main() => new A();"""
-    ],
-  },
-
-  'CANNOT_IMPLEMENT_MALFORMED': {
-    'id': 'XJUIAQ',
-    'template':
-        "Class '#{className}' can't implement the type '#{malformedType}' "
-        "because it is malformed.",
-    'howToFix': "Try correcting the malformed type annotation or removing the "
-        "type from the 'implements' clause.",
-    'examples': [
-      """
-class A implements Malformed {}
-main() => new A();"""
-    ],
-  },
-
-  'CANNOT_MIXIN_MALFORMED': {
-    'id': 'SSMNXN',
-    'template': "Class '#{className}' can't mixin the type '#{malformedType}' "
-        "because it is malformed.",
-    'howToFix': "Try correcting the malformed type annotation or removing the "
-        "type from the 'with' clause.",
-    'examples': [
-      """
-class A extends Object with Malformed {}
-main() => new A();"""
-    ],
-  },
-
-  'CANNOT_MIXIN': {
-    'id': 'KLSXDQ',
-    'template': "The type '#{type}' can't be mixed in.",
-    'howToFix': "Try removing '#{type}' from the 'with' clause.",
-    'examples': [
-      """
-class C extends Object with String {}
-
-main() => new C();
-""",
-      """
-typedef C = Object with String;
-
-main() => new C();
-"""
-    ],
-  },
-
-  'CANNOT_EXTEND_ENUM': {
-    'id': 'JEPRST',
-    'template':
-        "Class '#{className}' can't extend the type '#{enumType}' because "
-        "it is declared by an enum.",
-    'howToFix': "Try making '#{enumType}' a normal class or removing the "
-        "'extends' clause.",
-    'examples': [
-      """
-enum Enum { A }
-class B extends Enum {}
-main() => new B();"""
-    ],
-  },
-
-  'CANNOT_IMPLEMENT_ENUM': {
-    'id': 'JMJMSH',
-    'template': "Class '#{className}' can't implement the type '#{enumType}' "
-        "because it is declared by an enum.",
-    'howToFix': "Try making '#{enumType}' a normal class or removing the "
-        "type from the 'implements' clause.",
-    'examples': [
-      """
-enum Enum { A }
-class B implements Enum {}
-main() => new B();"""
-    ],
-  },
-
-  'CANNOT_MIXIN_ENUM': {
-    'id': 'YSYDIM',
-    'template':
-        "Class '#{className}' can't mixin the type '#{enumType}' because it "
-        "is declared by an enum.",
-    'howToFix': "Try making '#{enumType}' a normal class or removing the "
-        "type from the 'with' clause.",
-    'examples': [
-      """
-enum Enum { A }
-class B extends Object with Enum {}
-main() => new B();"""
-    ],
-  },
-
-  'CANNOT_INSTANTIATE_ENUM': {
-    'id': 'CQYIFU',
-    'template': "Enum type '#{enumName}' cannot be instantiated.",
-    'howToFix': "Try making '#{enumType}' a normal class or use an enum "
-        "constant.",
-    'examples': [
-      """
-enum Enum { A }
-main() => new Enum(0);""",
-      """
-enum Enum { A }
-main() => const Enum(0);"""
-    ],
-  },
-
-  'EMPTY_ENUM_DECLARATION': {
-    'id': 'JFPDOH',
-    'template': "Enum '#{enumName}' must contain at least one value.",
-    'howToFix': "Try adding an enum constant or making #{enumName} a "
-        "normal class.",
-    'examples': [
-      """
-enum Enum {}
-main() { Enum e; }"""
-    ],
-  },
-
-  'MISSING_ENUM_CASES': {
-    'id': 'HHEOIW',
-    'template': "Missing enum constants in switch statement: #{enumValues}.",
-    'howToFix': "Try adding the missing constants or a default case.",
-    'examples': [
-      """
-enum Enum { A, B }
-main() {
-switch (Enum.A) {
-case Enum.B: break;
-}
-}""",
-      """
-enum Enum { A, B, C }
-main() {
-switch (Enum.A) {
-case Enum.B: break;
-}
-}"""
-    ],
-  },
-
-  'DUPLICATE_EXTENDS_IMPLEMENTS': {
-    'id': 'BKRKEO',
-    'template': "'#{type}' can not be both extended and implemented.",
-  },
-
-  'DUPLICATE_IMPLEMENTS': {
-    'id': 'IWJFTU',
-    'template': "'#{type}' must not occur more than once "
-        "in the implements clause.",
-  },
-
-  'MULTI_INHERITANCE': {
-    'id': 'NWXGOI',
-    'template':
-        "Dart2js does not currently support inheritance of the same class "
-        "with different type arguments: Both #{firstType} and #{secondType} "
-        "are supertypes of #{thisType}.",
-  },
-
-  'ILLEGAL_SUPER_SEND': {
-    'id': 'LDRGIU',
-    'template': "'#{name}' cannot be called on super.",
-  },
-
-  'NO_SUCH_SUPER_MEMBER': {
-    'id': 'HIJJVG',
-    'template':
-        "Cannot resolve '#{memberName}' in a superclass of '#{className}'.",
-  },
-
-  'ADDITIONAL_TYPE_ARGUMENT': {
-    'id': 'HWYHWH',
-    'template': "Additional type argument.",
-  },
-
-  'MISSING_TYPE_ARGUMENT': {
-    'id': 'KYTQWA',
-    'template': "Missing type argument.",
-  },
-
-  // TODO(johnniwinther): Use ADDITIONAL_TYPE_ARGUMENT or
-  // MISSING_TYPE_ARGUMENT instead.
-  'TYPE_ARGUMENT_COUNT_MISMATCH': {
-    'id': 'ECXGRM',
-    'template': "Incorrect number of type arguments on '#{type}'.",
-  },
-
-  'GETTER_MISMATCH': {
-    'id': 'MNODFW',
-    'template': "Setter disagrees on: '#{modifiers}'.",
-  },
-
-  'SETTER_MISMATCH': {
-    'id': 'FMNHPL',
-    'template': "Getter disagrees on: '#{modifiers}'.",
-  },
-
-  'ILLEGAL_SETTER_FORMALS': {
-    'id': 'COTPVN',
-    'template': "A setter must have exactly one argument.",
-  },
-
-  'NO_STATIC_OVERRIDE': {
-    'id': 'EHINXB',
-    'template':
-        "Static member cannot override instance member '#{memberName}' of "
-        "'#{className}'.",
-  },
-
-  'NO_STATIC_OVERRIDE_CONT': {
-    'id': 'TEVJMA',
-    'template': "This is the instance member that cannot be overridden "
-        "by a static member.",
-  },
-
-  'INSTANCE_STATIC_SAME_NAME': {
-    'id': 'LTBFBO',
-    'template': "Instance member '#{memberName}' and static member of "
-        "superclass '#{className}' have the same name.",
-  },
-
-  'INSTANCE_STATIC_SAME_NAME_CONT': {
-    'id': 'CHSUCQ',
-    'template': "This is the static member with the same name.",
-  },
-
-  'INVALID_OVERRIDE_METHOD': {
-    'id': 'NINKPI',
-    'template': "The type '#{declaredType}' of method '#{name}' declared in "
-        "'#{class}' is not a subtype of the overridden method type "
-        "'#{inheritedType}' inherited from '#{inheritedClass}'.",
-  },
-
-  'INVALID_OVERRIDDEN_METHOD': {
-    'id': 'BQHUPY',
-    'template': "This is the overridden method '#{name}' declared in class "
-        "'#{class}'.",
-  },
-
-  'INVALID_OVERRIDE_GETTER': {
-    'id': 'KLMPWO',
-    'template': "The type '#{declaredType}' of getter '#{name}' declared in "
-        "'#{class}' is not assignable to the type '#{inheritedType}' of the "
-        "overridden getter inherited from '#{inheritedClass}'.",
-  },
-
-  'INVALID_OVERRIDDEN_GETTER': {
-    'id': 'ASSKCT',
-    'template': "This is the overridden getter '#{name}' declared in class "
-        "'#{class}'.",
-  },
-
-  'INVALID_OVERRIDE_GETTER_WITH_FIELD': {
-    'id': 'TCCGXU',
-    'template': "The type '#{declaredType}' of field '#{name}' declared in "
-        "'#{class}' is not assignable to the type '#{inheritedType}' of the "
-        "overridden getter inherited from '#{inheritedClass}'.",
-  },
-
-  'INVALID_OVERRIDE_FIELD_WITH_GETTER': {
-    'id': 'UMMEXO',
-    'template': "The type '#{declaredType}' of getter '#{name}' declared in "
-        "'#{class}' is not assignable to the type '#{inheritedType}' of the "
-        "overridden field inherited from '#{inheritedClass}'.",
-  },
-
-  'INVALID_OVERRIDE_SETTER': {
-    'id': 'BWRGEC',
-    'template': "The type '#{declaredType}' of setter '#{name}' declared in "
-        "'#{class}' is not assignable to the type '#{inheritedType}' of the "
-        "overridden setter inherited from '#{inheritedClass}'.",
-  },
-
-  'INVALID_OVERRIDDEN_SETTER': {
-    'id': 'XQUOLL',
-    'template': "This is the overridden setter '#{name}' declared in class "
-        "'#{class}'.",
-  },
-
-  'INVALID_OVERRIDE_SETTER_WITH_FIELD': {
-    'id': 'GKGOFA',
-    'template': "The type '#{declaredType}' of field '#{name}' declared in "
-        "'#{class}' is not assignable to the type '#{inheritedType}' of the "
-        "overridden setter inherited from '#{inheritedClass}'.",
-  },
-
-  'INVALID_OVERRIDE_FIELD_WITH_SETTER': {
-    'id': 'OOXKHQ',
-    'template': "The type '#{declaredType}' of setter '#{name}' declared in "
-        "'#{class}' is not assignable to the type '#{inheritedType}' of the "
-        "overridden field inherited from '#{inheritedClass}'.",
-  },
-
-  'INVALID_OVERRIDE_FIELD': {
-    'id': 'LDPKOL',
-    'template': "The type '#{declaredType}' of field '#{name}' declared in "
-        "'#{class}' is not assignable to the type '#{inheritedType}' of the "
-        "overridden field inherited from '#{inheritedClass}'.",
-  },
-
-  'INVALID_OVERRIDDEN_FIELD': {
-    'id': 'UNQFWX',
-    'template': "This is the overridden field '#{name}' declared in class "
-        "'#{class}'.",
-  },
-
-  'CANNOT_OVERRIDE_FIELD_WITH_METHOD': {
-    'id': 'SYKCSK',
-    'template': "Method '#{name}' in '#{class}' can't override field from "
-        "'#{inheritedClass}'.",
-  },
-
-  'CANNOT_OVERRIDE_FIELD_WITH_METHOD_CONT': {
-    'id': 'HYHQSO',
-    'template': "This is the field that cannot be overridden by a method.",
-  },
-
-  'CANNOT_OVERRIDE_METHOD_WITH_FIELD': {
-    'id': 'UROMAS',
-    'template': "Field '#{name}' in '#{class}' can't override method from "
-        "'#{inheritedClass}'.",
-  },
-
-  'CANNOT_OVERRIDE_METHOD_WITH_FIELD_CONT': {
-    'id': 'NSORYS',
-    'template': "This is the method that cannot be overridden by a field.",
-  },
-
-  'CANNOT_OVERRIDE_GETTER_WITH_METHOD': {
-    'id': 'MMFIOH',
-    'template': "Method '#{name}' in '#{class}' can't override getter from "
-        "'#{inheritedClass}'.",
-  },
-
-  'CANNOT_OVERRIDE_GETTER_WITH_METHOD_CONT': {
-    'id': 'YGWPDH',
-    'template': "This is the getter that cannot be overridden by a method.",
-  },
-
-  'CANNOT_OVERRIDE_METHOD_WITH_GETTER': {
-    'id': 'BNKNXO',
-    'template': "Getter '#{name}' in '#{class}' can't override method from "
-        "'#{inheritedClass}'.",
-  },
-
-  'CANNOT_OVERRIDE_METHOD_WITH_GETTER_CONT': {
-    'id': 'KFBCYX',
-    'template': "This is the method that cannot be overridden by a getter.",
-  },
-
-  'MISSING_FORMALS': {
-    'id': 'BOERAF',
-    'template': "Formal parameters are missing.",
-  },
-
-  'EXTRA_FORMALS': {
-    'id': 'UTWRIU',
-    'template': "Formal parameters are not allowed here.",
-  },
-
-  'UNARY_OPERATOR_BAD_ARITY': {
-    'id': 'TNHLAL',
-    'template': "Operator '#{operatorName}' must have no parameters.",
-  },
-
-  'MINUS_OPERATOR_BAD_ARITY': {
-    'id': 'SXDRRU',
-    'template': "Operator '-' must have 0 or 1 parameters.",
-  },
-
-  'BINARY_OPERATOR_BAD_ARITY': {
-    'id': 'QKWAUM',
-    'template': "Operator '#{operatorName}' must have exactly 1 parameter.",
-  },
-
-  'TERNARY_OPERATOR_BAD_ARITY': {
-    'id': 'LSMQGF',
-    'template': "Operator '#{operatorName}' must have exactly 2 parameters.",
-  },
-
-  'OPERATOR_OPTIONAL_PARAMETERS': {
-    'id': 'HSGRBV',
-    'template': "Operator '#{operatorName}' cannot have optional parameters.",
-  },
-
-  'OPERATOR_NAMED_PARAMETERS': {
-    'id': 'EACWGS',
-    'template': "Operator '#{operatorName}' cannot have named parameters.",
-  },
-
-  'CONSTRUCTOR_WITH_RETURN_TYPE': {
-    'id': 'OPMBHF',
-    'template': "Cannot have return type for constructor.",
-  },
-
-  'CANNOT_RETURN_FROM_CONSTRUCTOR': {
-    'id': 'NFUGNH',
-    'template': "Constructors can't return values.",
-    'howToFix': "Remove the return statement or use a factory constructor.",
-    'examples': [
-      """
-class C {
-C() {
-  return 1;
-}
-}
-
-main() => new C();"""
-    ],
-  },
-
-  'ILLEGAL_FINAL_METHOD_MODIFIER': {
-    'id': 'YUKCVU',
-    'template': "Cannot have final modifier on method.",
-  },
-
-  'ILLEGAL_CONST_FIELD_MODIFIER': {
-    'id': 'JGFAGV',
-    'template': "Cannot have const modifier on non-static field.",
-    'howToFix': "Try adding a static modifier, or removing the const modifier.",
-    'examples': [
-      """
-class C {
-const int a = 1;
-}
-
-main() => new C();"""
-    ],
-  },
-
-  'ILLEGAL_CONSTRUCTOR_MODIFIERS': {
-    'id': 'WODRHN',
-    'template': "Illegal constructor modifiers: '#{modifiers}'.",
-  },
-
-  'ILLEGAL_MIXIN_APPLICATION_MODIFIERS': {
-    'id': 'OFLFHN',
-    'template': "Illegal mixin application modifiers: '#{modifiers}'.",
-  },
-
-  'ILLEGAL_MIXIN_SUPERCLASS': {
-    'id': 'TPVVYN',
-    'template': "Class used as mixin must have Object as superclass.",
-  },
-
-  'ILLEGAL_MIXIN_OBJECT': {
-    'id': 'CMVTLF',
-    'template': "Cannot use Object as mixin.",
-  },
-
-  'ILLEGAL_MIXIN_CONSTRUCTOR': {
-    'id': 'HXBUIB',
-    'template': "Class used as mixin cannot have non-factory constructor.",
-  },
-
-  'ILLEGAL_MIXIN_CYCLE': {
-    'id': 'ANXAMU',
-    'template': "Class used as mixin introduces mixin cycle: "
-        "'#{mixinName1}' <-> '#{mixinName2}'.",
-  },
-
-  'ILLEGAL_MIXIN_WITH_SUPER': {
-    'id': 'KIEUGK',
-    'template': "Cannot use class '#{className}' as a mixin because it uses "
-        "'super'.",
-  },
-
-  'ILLEGAL_MIXIN_SUPER_USE': {
-    'id': 'QKUPLH',
-    'template': "Use of 'super' in class used as mixin.",
-  },
-
-  'PARAMETER_NAME_EXPECTED': {
-    'id': 'JOUOBT',
-    'template': "parameter name expected.",
-  },
-
-  'CANNOT_RESOLVE_GETTER': {
-    'id': 'TDHKSW',
-    'template': "Cannot resolve getter.",
-  },
-
-  'CANNOT_RESOLVE_SETTER': {
-    'id': 'QQFANP',
-    'template': "Cannot resolve setter.",
-  },
-
-  'ASSIGNING_FINAL_FIELD_IN_SUPER': {
-    'id': 'LXUPCC',
-    'template': "Cannot assign a value to final field '#{name}' "
-        "in superclass '#{superclassName}'.",
-  },
-
-  'ASSIGNING_METHOD': {
-    'id': 'JUVMYC',
-    'template': "Cannot assign a value to a method.",
-  },
-
-  'ASSIGNING_METHOD_IN_SUPER': {
-    'id': 'AGMAXN',
-    'template': "Cannot assign a value to method '#{name}' "
-        "in superclass '#{superclassName}'.",
-  },
-
-  'ASSIGNING_TYPE': {
-    'id': 'VXTPWE',
-    'template': "Cannot assign a value to a type.",
-  },
-
-  'IF_NULL_ASSIGNING_TYPE': {
-    'id': 'XBRHGK',
-    'template':
-        "Cannot assign a value to a type. Note that types are never null, "
-        "so this ??= assignment has no effect.",
-    'howToFix': "Try removing the '??=' assignment.",
-    'examples': ["class A {} main() { print(A ??= 3);}",],
-  },
-
-  'VOID_NOT_ALLOWED': {
-    'id': 'DMMDXT',
-    'template':
-        "Type 'void' can't be used here because it isn't a return type.",
-    'howToFix':
-        "Try removing 'void' keyword or replace it with 'var', 'final', "
-        "or a type.",
-    'examples': ["void x; main() {}", "foo(void x) {} main() { foo(null); }",],
-  },
-
-  'NULL_NOT_ALLOWED': {
-    'id': 'STYNSK',
-    'template': "`null` can't be used here.",
-  },
-
-  'BEFORE_TOP_LEVEL': {
-    'id': 'GRCXQF',
-    'template': "Part header must come before top-level definitions.",
-  },
-
-  'IMPORT_PART_OF': {
-    'id': 'VANCWE',
-    'template': "The imported library must not have a 'part-of' directive.",
-    'howToFix': "Try removing the 'part-of' directive or replacing the "
-        "import of the library with a 'part' directive.",
-    'examples': [
-      {
-        'main.dart': """
-library library;
-
-import 'part.dart';
-
-main() {}
-""",
-        'part.dart': """
-part of library;
-"""
-      }
-    ],
-  },
-
-  'IMPORT_PART_OF_HERE': {
-    'id': 'TRSZOJ',
-    'template': 'The library is imported here.',
-  },
-
-  'MAIN_HAS_PART_OF': {
-    'id': 'MFMRRL',
-    'template': "The main application file must not have a 'part-of' "
-                "directive.",
-    'howToFix': "Try removing the 'part-of' directive or starting compilation "
-                "from another file.",
-    'examples': [
-      {
-        'main.dart': """
-part of library;
-
-main() {}
-"""
-      }
-    ],
-  },
-
-  'LIBRARY_NAME_MISMATCH': {
-    'id': 'AXGYPQ',
-    'template': "Expected part of library name '#{libraryName}'.",
-    'howToFix': "Try changing the directive to 'part of #{libraryName};'.",
-    'examples': [
-      {
-        'main.dart': """
-library lib.foo;
-
-part 'part.dart';
-
-main() {}
-""",
-        'part.dart': """
-part of lib.bar;
-"""
-      }
-    ],
-  },
-
-  'MISSING_LIBRARY_NAME': {
-    'id': 'NYQNCA',
-    'template': "Library has no name. Part directive expected library name "
-        "to be '#{libraryName}'.",
-    'howToFix': "Try adding 'library #{libraryName};' to the library.",
-    'examples': [
-      {
-        'main.dart': """
-part 'part.dart';
-
-main() {}
-""",
-        'part.dart': """
-part of lib.foo;
-"""
-      }
-    ],
-  },
-
-  'THIS_IS_THE_PART_OF_TAG': {
-    'id': 'RPSJRS',
-    'template': "This is the part of directive.",
-  },
-
-  'MISSING_PART_OF_TAG': {
-    'id': 'QNYCMV',
-    'template': "This file has no part-of tag, but it is being used as a part.",
-  },
-
-  'DUPLICATED_PART_OF': {
-    'id': 'UJDYHF',
-    'template': "Duplicated part-of directive.",
-  },
-
-  'DUPLICATED_LIBRARY_NAME': {
-    'id': 'OSEHXI',
-    'template': "Duplicated library name '#{libraryName}'.",
-  },
-
-  'DUPLICATED_RESOURCE': {
-    'id': 'UFWKBY',
-    'template': "The resource '#{resourceUri}' is loaded through both "
-        "'#{canonicalUri1}' and '#{canonicalUri2}'.",
-  },
-
-  'DUPLICATED_LIBRARY_RESOURCE': {
-    'id': 'KYGYTT',
-    'template':
-        "The library '#{libraryName}' in '#{resourceUri}' is loaded through "
-        "both '#{canonicalUri1}' and '#{canonicalUri2}'.",
-  },
-
-  // This is used as an exception.
-  'INVALID_SOURCE_FILE_LOCATION': {
-    'id': 'WIGJFG',
-    'template': """
-Invalid offset (#{offset}) in source map.
-File: #{fileName}
-Length: #{length}""",
-  },
-
-  'TOP_LEVEL_VARIABLE_DECLARED_STATIC': {
-    'id': 'IVNDML',
-    'template': "Top-level variable cannot be declared static.",
-  },
-
-  'REFERENCE_IN_INITIALIZATION': {
-    'id': 'OVWTEU',
-    'template': "Variable '#{variableName}' is referenced during its "
-        "initialization.",
-    'howToFix': "If you are trying to reference a shadowed variable, rename "
-        "one of the variables.",
-    'examples': [
-      """
-foo(t) {
-var t = t;
-return t;
-}
-
-main() => foo(1);
-"""
-    ],
-  },
-
-  'CONST_WITHOUT_INITIALIZER': {
-    'id': 'UDWCNH',
-    'template': "A constant variable must be initialized.",
-    'howToFix': "Try adding an initializer or "
-        "removing the 'const' modifier.",
-    'examples': [
-      """
-void main() {
-const c; // This constant variable must be initialized.
-}"""
-    ],
-  },
-
-  'FINAL_WITHOUT_INITIALIZER': {
-    'id': 'YMESFI',
-    'template': "A final variable must be initialized.",
-    'howToFix': "Try adding an initializer or "
-        "removing the 'final' modifier.",
-    'examples': ["class C { static final field; } main() => C.field;"],
-  },
-
-  'CONST_LOOP_VARIABLE': {
-    'id': 'WUSKMG',
-    'template': "A loop variable cannot be constant.",
-    'howToFix': "Try remove the 'const' modifier or "
-        "replacing it with a 'final' modifier.",
-    'examples': [
-      """
-void main() {
-  for (const c in []) {}
-}"""
-    ],
-  },
-
-  'MEMBER_USES_CLASS_NAME': {
-    'id': 'TVFYRK',
-    'template': "Member variable can't have the same name as the class it is "
-        "declared in.",
-    'howToFix': "Try renaming the variable.",
-    'examples': [
-      """
-class A { var A; }
-main() {
-var a = new A();
-a.A = 1;
-}
-""",
-      """
-class A { static var A; }
-main() => A.A = 1;
-"""
-    ],
-  },
-
-  'WRONG_NUMBER_OF_ARGUMENTS_FOR_ASSERT': {
-    'id': 'IXYNUF',
-    'template': "Wrong number of arguments to assert. Should be 1, but given "
-        "#{argumentCount}.",
-  },
-
-  'ASSERT_IS_GIVEN_NAMED_ARGUMENTS': {
-    'id': 'EJFDTO',
-    'template':
-        "'assert' takes no named arguments, but given #{argumentCount}.",
-  },
-
-  'FACTORY_REDIRECTION_IN_NON_FACTORY': {
-    'id': 'DTBWEX',
-    'template': "Factory redirection only allowed in factories.",
-  },
-
-  'MISSING_FACTORY_KEYWORD': {
-    'id': 'HOQYYA',
-    'template': "Did you forget a factory keyword here?",
-  },
-
-  'NO_SUCH_METHOD_IN_NATIVE': {
-    'id': 'MSDDBX',
-    'template':
-        "'NoSuchMethod' is not supported for classes that extend native "
-        "classes.",
-  },
-
-  'DEFERRED_LIBRARY_DART_2_DART': {
-    'id': 'RIRQAH',
-    'template': "Deferred loading is not supported by the dart backend yet. "
-        "The output will not be split.",
-  },
-
-  'DEFERRED_LIBRARY_WITHOUT_PREFIX': {
-    'id': 'CARRII',
-    'template': "This import is deferred but there is no prefix keyword.",
-    'howToFix': "Try adding a prefix to the import."
-  },
-
-  'DEFERRED_OLD_SYNTAX': {
-    'id': 'QCBRAE',
-    'template': "The DeferredLibrary annotation is obsolete.",
-    'howToFix':
-        "Use the \"import 'lib.dart' deferred as prefix\" syntax instead.",
-  },
-
-  'DEFERRED_LIBRARY_DUPLICATE_PREFIX': {
-    'id': 'BBMJTD',
-    'template': "The prefix of this deferred import is not unique.",
-    'howToFix': "Try changing the import prefix."
-  },
-
-  'DEFERRED_TYPE_ANNOTATION': {
-    'id': 'JOUEFD',
-    'template': "The type #{node} is deferred. "
-        "Deferred types are not valid as type annotations.",
-    'howToFix': "Try using a non-deferred abstract class as an interface.",
-  },
-
-  'ILLEGAL_STATIC': {
-    'id': 'HFBHVE',
-    'template': "Modifier static is only allowed on functions declared in "
-        "a class.",
-  },
-
-  'STATIC_FUNCTION_BLOAT': {
-    'id': 'SJHTKF',
-    'template': "Using '#{class}.#{name}' may lead to unnecessarily large "
-        "generated code.",
-    'howToFix': "Try adding '@MirrorsUsed(...)' as described at "
-        "https://goo.gl/Akrrog.",
-  },
-
-  'NON_CONST_BLOAT': {
-    'id': 'RDRSHO',
-    'template': "Using 'new #{name}' may lead to unnecessarily large generated "
-        "code.",
-    'howToFix': "Try using 'const #{name}' or adding '@MirrorsUsed(...)' as "
-        "described at https://goo.gl/Akrrog.",
-  },
-
-  'STRING_EXPECTED': {
-    'id': 'OEJOOI',
-    'template': "Expected a 'String', but got an instance of '#{type}'.",
-  },
-
-  'PRIVATE_IDENTIFIER': {
-    'id': 'XAHVWI',
-    'template': "'#{value}' is not a valid Symbol name because it starts with "
-        "'_'.",
-  },
-
-  'PRIVATE_NAMED_PARAMETER': {
-    'id': 'VFGCLK',
-    'template': "Named optional parameter can't have a library private name.",
-    'howToFix': "Try removing the '_' or making the parameter positional or "
-        "required.",
-    'examples': ["""foo({int _p}) {} main() => foo();"""],
-  },
-
-  'UNSUPPORTED_LITERAL_SYMBOL': {
-    'id': 'OYCDII',
-    'template':
-        "Symbol literal '##{value}' is currently unsupported by dart2js.",
-  },
-
-  'INVALID_SYMBOL': {
-    'id': 'RUXMBL',
-    'template': '''
-'#{value}' is not a valid Symbol name because is not:
-* an empty String,
-* a user defined operator,
-* a qualified non-private identifier optionally followed by '=', or
-* a qualified non-private identifier followed by '.' and a user-defined '''
-        "operator.",
-  },
-
-  'AMBIGUOUS_REEXPORT': {
-    'id': 'YNTOND',
-    'template': "'#{name}' is (re)exported by multiple libraries.",
-  },
-
-  'AMBIGUOUS_LOCATION': {
-    'id': 'SKLTYA',
-    'template': "'#{name}' is defined here.",
-  },
-
-  'IMPORTED_HERE': {'id': 'IMUXAE', 'template': "'#{name}' is imported here.",},
-
-  'OVERRIDE_EQUALS_NOT_HASH_CODE': {
-    'id': 'MUHYXI',
-    'template': "The class '#{class}' overrides 'operator==', "
-        "but not 'get hashCode'.",
-  },
-
-  'INTERNAL_LIBRARY_FROM': {
-    'id': 'RXOCLX',
-    'template': "Internal library '#{resolvedUri}' is not accessible from "
-        "'#{importingUri}'.",
-  },
-
-  'INTERNAL_LIBRARY': {
-    'id': 'SYLJAV',
-    'template': "Internal library '#{resolvedUri}' is not accessible.",
-  },
-
-  'JS_INTEROP_CLASS_CANNOT_EXTEND_DART_CLASS': {
-    'id': 'LSHKJK',
-    'template':
-        "Js-interop class '#{cls}' cannot extend from the non js-interop "
-        "class '#{superclass}'.",
-    'howToFix': "Annotate the superclass with @JS.",
-    'examples': [
-      """
-            import 'package:js/js.dart';
-
-            class Foo { }
-
-            @JS()
-            class Bar extends Foo { }
-
-            main() {
-              new Bar();
-            }
-            """
-    ],
-  },
-
-  'JS_INTEROP_CLASS_NON_EXTERNAL_MEMBER': {
-    'id': 'QLLLEE',
-    'template':
-        "Member '#{member}' in js-interop class '#{cls}' is not external.",
-    'howToFix': "Mark all interop methods external",
-    'examples': [
-      """
-            import 'package:js/js.dart';
-
-            @JS()
-            class Foo {
-              bar() {}
-            }
-
-            main() {
-              new Foo().bar();
-            }
-            """
-    ],
-  },
-
-  'JS_INTEROP_METHOD_WITH_NAMED_ARGUMENTS': {
-    'id': 'TDQHRY',
-    'template': "Js-interop method '#{method}' has named arguments but is not "
-        "a factory constructor of an @anonymous @JS class.",
-    'howToFix': "Remove all named arguments from js-interop method or "
-        "in the case of a factory constructor annotate the class "
-        "as @anonymous.",
-    'examples': [
-      """
-            import 'package:js/js.dart';
-
-            @JS()
-            class Foo {
-              external bar(foo, {baz});
-            }
-
-            main() {
-              new Foo().bar(4, baz: 5);
-            }
-            """
-    ],
-  },
-
-  'JS_OBJECT_LITERAL_CONSTRUCTOR_WITH_POSITIONAL_ARGUMENTS': {
-    'id': 'EHEKUY',
-    'template':
-        "Parameter '#{parameter}' in anonymous js-interop class '#{cls}' "
-        "object literal constructor is positional instead of named."
-        ".",
-    'howToFix': "Make all arguments in external factory object literal "
-        "constructors named.",
-    'examples': [
-      """
-            import 'package:js/js.dart';
-
-            @anonymous
-            @JS()
-            class Foo {
-              external factory Foo(foo, {baz});
-            }
-
-            main() {
-              new Foo(5, baz: 5);
-            }
-            """
-    ],
-  },
-
-  'LIBRARY_NOT_FOUND': {
-    'id': 'BARPSL',
-    'template': "Library not found '#{resolvedUri}'.",
-  },
-
-  'LIBRARY_NOT_SUPPORTED': {
-    'id': 'GDXUNS',
-    'template': "Library not supported '#{resolvedUri}'.",
-    'howToFix': "Try removing the dependency or enabling support using "
-        "the '--categories' option.",
-    'examples': [
-//            """
-//            import 'dart:io';
-//            main() {}
-//            """
-    ],
-    // TODO(johnniwinther): Enable example when message_kind_test.dart
-    // supports library loader callbacks.
-  },
-
-  'UNSUPPORTED_EQ_EQ_EQ': {
-    'id': 'GPOVNO',
-    'template': "'===' is not an operator. "
-        "Did you mean '#{lhs} == #{rhs}' or 'identical(#{lhs}, #{rhs})'?",
-  },
-
-  'UNSUPPORTED_BANG_EQ_EQ': {
-    'id': 'HDYKMV',
-    'template': "'!==' is not an operator. "
-        "Did you mean '#{lhs} != #{rhs}' or '!identical(#{lhs}, #{rhs})'?",
-  },
-
-  'UNSUPPORTED_PREFIX_PLUS': {
-    'id': 'LSQTHP',
-    'template': "'+' is not a prefix operator. ",
-    'howToFix': "Try removing '+'.",
-    'examples': ["main() => +2;  // No longer a valid way to write '2'"],
-  },
-
-  'UNSUPPORTED_THROW_WITHOUT_EXP': {
-    'id': 'QOAKGE',
-    'template': "No expression after 'throw'. "
-        "Did you mean 'rethrow'?",
-  },
-
-  'DEPRECATED_TYPEDEF_MIXIN_SYNTAX': {
-    'id': 'BBGGFE',
-    'template': "'typedef' not allowed here. ",
-    'howToFix': "Try replacing 'typedef' with 'class'.",
-    'examples': [
-      """
-class B { }
-class M1 {  }
-typedef C = B with M1;  // Need to replace 'typedef' with 'class'.
-main() { new C(); }
-"""
-    ],
-  },
-
-  'MIRRORS_EXPECTED_STRING': {
-    'id': 'XSKTIB',
-    'template':
-        "Can't use '#{name}' here because it's an instance of '#{type}' "
-        "and a 'String' value is expected.",
-    'howToFix': "Did you forget to add quotes?",
-    'examples': [
-      """
-// 'Foo' is a type literal, not a string.
-@MirrorsUsed(symbols: const [Foo])
-import 'dart:mirrors';
-
-class Foo {}
-
-main() {}
-"""
-    ],
-  },
-
-  'MIRRORS_EXPECTED_STRING_OR_TYPE': {
-    'id': 'JQDJPL',
-    'template':
-        "Can't use '#{name}' here because it's an instance of '#{type}' "
-        "and a 'String' or 'Type' value is expected.",
-    'howToFix': "Did you forget to add quotes?",
-    'examples': [
-      """
-// 'main' is a method, not a class.
-@MirrorsUsed(targets: const [main])
-import 'dart:mirrors';
-
-main() {}
-"""
-    ],
-  },
-
-  'MIRRORS_EXPECTED_STRING_OR_LIST': {
-    'id': 'UVYCOE',
-    'template':
-        "Can't use '#{name}' here because it's an instance of '#{type}' "
-        "and a 'String' or 'List' value is expected.",
-    'howToFix': "Did you forget to add quotes?",
-    'examples': [
-      """
-// 'Foo' is not a string.
-@MirrorsUsed(symbols: Foo)
-import 'dart:mirrors';
-
-class Foo {}
-
-main() {}
-"""
-    ],
-  },
-
-  'MIRRORS_EXPECTED_STRING_TYPE_OR_LIST': {
-    'id': 'WSYDFL',
-    'template':
-        "Can't use '#{name}' here because it's an instance of '#{type}' "
-        "but a 'String', 'Type', or 'List' value is expected.",
-    'howToFix': "Did you forget to add quotes?",
-    'examples': [
-      """
-// '1' is not a string.
-@MirrorsUsed(targets: 1)
-import 'dart:mirrors';
-
-main() {}
-"""
-    ],
-  },
-
-  'MIRRORS_CANNOT_RESOLVE_IN_CURRENT_LIBRARY': {
-    'id': 'VDBBNE',
-    'template': "Can't find '#{name}' in the current library.",
-    // TODO(ahe): The closest identifiers in edit distance would be nice.
-    'howToFix': "Did you forget to add an import?",
-    'examples': [
-      """
-// 'window' is not in scope because dart:html isn't imported.
-@MirrorsUsed(targets: 'window')
-import 'dart:mirrors';
-
-main() {}
-"""
-    ],
-  },
-
-  'MIRRORS_CANNOT_RESOLVE_IN_LIBRARY': {
-    'id': 'RUEKXE',
-    'template': "Can't find '#{name}' in the library '#{library}'.",
-    // TODO(ahe): The closest identifiers in edit distance would be nice.
-    'howToFix': "Is '#{name}' spelled right?",
-    'examples': [
-      """
-// 'List' is misspelled.
-@MirrorsUsed(targets: 'dart.core.Lsit')
-import 'dart:mirrors';
-
-main() {}
-"""
-    ],
-  },
-
-  'MIRRORS_CANNOT_FIND_IN_ELEMENT': {
-    'id': 'ACPDCS',
-    'template': "Can't find '#{name}' in '#{element}'.",
-    // TODO(ahe): The closest identifiers in edit distance would be nice.
-    'howToFix': "Is '#{name}' spelled right?",
-    'examples': [
-      """
-// 'addAll' is misspelled.
-@MirrorsUsed(targets: 'dart.core.List.addAl')
-import 'dart:mirrors';
-
-main() {}
-"""
-    ],
-  },
-
-  'INVALID_URI': {
-    'id': 'QQEQMK',
-    'template': "'#{uri}' is not a valid URI.",
-    'howToFix': DONT_KNOW_HOW_TO_FIX,
-    'examples': [
-      """
-// can't have a '[' in a URI
-import '../../Udyn[mic ils/expect.dart';
-
-main() {}
-"""
-    ],
-  },
-
-  'INVALID_PACKAGE_CONFIG': {
-    'id': 'XKFAJO',
-    'template': """Package config file '#{uri}' is invalid.
-#{exception}""",
-    'howToFix': DONT_KNOW_HOW_TO_FIX
-  },
-
-  'INVALID_PACKAGE_URI': {
-    'id': 'MFVNNJ',
-    'template': "'#{uri}' is not a valid package URI (#{exception}).",
-    'howToFix': DONT_KNOW_HOW_TO_FIX,
-    'examples': [
-      """
-// can't have a 'top level' package URI
-import 'package:foo.dart';
-
-main() {}
-""",
-      """
-// can't have 2 slashes
-import 'package://foo/foo.dart';
-
-main() {}
-""",
-      """
-// package name must be valid
-import 'package:not\valid/foo.dart';
-
-main() {}
-"""
-    ],
-  },
-
-  'READ_SCRIPT_ERROR': {
-    'id': 'JDDYLH',
-    'template': "Can't read '#{uri}' (#{exception}).",
-    // Don't know how to fix since the underlying error is unknown.
-    'howToFix': DONT_KNOW_HOW_TO_FIX,
-    'examples': [
-      """
-// 'foo.dart' does not exist.
-import 'foo.dart';
-
-main() {}
-"""
-    ],
-  },
-
-  'READ_SELF_ERROR': {
-    'id': 'CRJUAV',
-    'template': "#{exception}",
-    // Don't know how to fix since the underlying error is unknown.
-    'howToFix': DONT_KNOW_HOW_TO_FIX
-  },
-
-  'EXTRANEOUS_MODIFIER': {
-    'id': 'DPLVJG',
-    'template': "Can't have modifier '#{modifier}' here.",
-    'howToFix': "Try removing '#{modifier}'.",
-    'examples': [
-      "var String foo; main(){}",
-      // "var get foo; main(){}",
-      "var set foo; main(){}",
-      "var final foo; main(){}",
-      "var var foo; main(){}",
-      "var const foo; main(){}",
-      "var abstract foo; main(){}",
-      "var static foo; main(){}",
-      "var external foo; main(){}",
-      "get var foo; main(){}",
-      "set var foo; main(){}",
-      "final var foo; main(){}",
-      "var var foo; main(){}",
-      "const var foo; main(){}",
-      "abstract var foo; main(){}",
-      "static var foo; main(){}",
-      "external var foo; main(){}"
-    ],
-  },
-
-  'EXTRANEOUS_MODIFIER_REPLACE': {
-    'id': 'SSXDLN',
-    'template': "Can't have modifier '#{modifier}' here.",
-    'howToFix': "Try replacing modifier '#{modifier}' with 'var', 'final', "
-        "or a type.",
-    'examples': [
-      // "get foo; main(){}",
-      "set foo; main(){}",
-      "abstract foo; main(){}",
-      "static foo; main(){}",
-      "external foo; main(){}"
-    ],
-  },
-
-  'ABSTRACT_CLASS_INSTANTIATION': {
-    'id': 'KOBCRO',
-    'template': "Can't instantiate abstract class.",
-    'howToFix': DONT_KNOW_HOW_TO_FIX,
-    'examples': ["abstract class A {} main() { new A(); }"],
-  },
-
-  'BODY_EXPECTED': {
-    'id': 'YXCAHO',
-    'template': "Expected a function body or '=>'.",
-    // TODO(ahe): In some scenarios, we can suggest removing the 'static'
-    // keyword.
-    'howToFix': "Try adding {}.",
-    'examples': ["main();"],
-  },
-
-  'MIRROR_BLOAT': {
-    'id': 'BSEAIT',
-    'template':
-        "#{count} methods retained for use by dart:mirrors out of #{total}"
-        " total methods (#{percentage}%).",
-  },
-
-  'MIRROR_IMPORT': {'id': 'BDAETE', 'template': "Import of 'dart:mirrors'.",},
-
-  'MIRROR_IMPORT_NO_USAGE': {
-    'id': 'OJOHTR',
-    'template':
-        "This import is not annotated with @MirrorsUsed, which may lead to "
-        "unnecessarily large generated code.",
-    'howToFix': "Try adding '@MirrorsUsed(...)' as described at "
-        "https://goo.gl/Akrrog.",
-  },
-
-  'JS_PLACEHOLDER_CAPTURE': {
-    'id': 'EJXEGQ',
-    'template': "JS code must not use '#' placeholders inside functions.",
-    'howToFix': "Use an immediately called JavaScript function to capture the"
-        " the placeholder values as JavaScript function parameters.",
-  },
-
-  'WRONG_ARGUMENT_FOR_JS_INTERCEPTOR_CONSTANT': {
-    'id': 'JHRISO',
-    'template':
-        "Argument for 'JS_INTERCEPTOR_CONSTANT' must be a type constant.",
-  },
-
-  'EXPECTED_IDENTIFIER_NOT_RESERVED_WORD': {
-    'id': 'FEJXJF',
-    'template': "'#{keyword}' is a reserved word and can't be used here.",
-    'howToFix': "Try using a different name.",
-    'examples': ["do() {} main() {}"],
-  },
-
-  'NAMED_FUNCTION_EXPRESSION': {
-    'id': 'CTHFPI',
-    'template': "Function expression '#{name}' cannot be named.",
-    'howToFix': "Try removing the name.",
-    'examples': ["main() { var f = func() {}; }"],
-  },
-
-  'UNUSED_METHOD': {
-    'id': 'PKLRQL',
-    'template': "The method '#{name}' is never called.",
-    'howToFix': "Consider deleting it.",
-    'examples': ["deadCode() {} main() {}"],
-  },
-
-  'UNUSED_CLASS': {
-    'id': 'TBIECC',
-    'template': "The class '#{name}' is never used.",
-    'howToFix': "Consider deleting it.",
-    'examples': ["class DeadCode {} main() {}"],
-  },
-
-  'UNUSED_TYPEDEF': {
-    'id': 'JBIPCN',
-    'template': "The typedef '#{name}' is never used.",
-    'howToFix': "Consider deleting it.",
-    'examples': ["typedef DeadCode(); main() {}"],
-  },
-
-  'ABSTRACT_METHOD': {
-    'id': 'HOKOBG',
-    'template': "The method '#{name}' has no implementation in "
-        "class '#{class}'.",
-    'howToFix': "Try adding a body to '#{name}' or declaring "
-        "'#{class}' to be 'abstract'.",
-    'examples': [
-      """
-class Class {
-method();
-}
-main() => new Class().method();
-"""
-    ],
-  },
-
-  'ABSTRACT_GETTER': {
-    'id': 'VKTRNK',
-    'template': "The getter '#{name}' has no implementation in "
-        "class '#{class}'.",
-    'howToFix': "Try adding a body to '#{name}' or declaring "
-        "'#{class}' to be 'abstract'.",
-    'examples': [
-      """
-class Class {
-get getter;
-}
-main() => new Class();
-"""
-    ],
-  },
-
-  'ABSTRACT_SETTER': {
-    'id': 'XGDGKK',
-    'template': "The setter '#{name}' has no implementation in "
-        "class '#{class}'.",
-    'howToFix': "Try adding a body to '#{name}' or declaring "
-        "'#{class}' to be 'abstract'.",
-    'examples': [
-      """
-class Class {
-set setter(_);
-}
-main() => new Class();
-"""
-    ],
-  },
-
-  'INHERIT_GETTER_AND_METHOD': {
-    'id': 'UMEUEG',
-    'template': "The class '#{class}' can't inherit both getters and methods "
-        "by the named '#{name}'.",
-    'howToFix': DONT_KNOW_HOW_TO_FIX,
-    'examples': [
-      """
-class A {
-get member => null;
-}
-class B {
-member() {}
-}
-class Class implements A, B {
-}
-main() => new Class();
-"""
-    ],
-  },
-
-  'INHERITED_METHOD': {
-    'id': 'GMSVBM',
-    'template': "The inherited method '#{name}' is declared here in class "
-        "'#{class}'.",
-  },
-
-  'INHERITED_EXPLICIT_GETTER': {
-    'id': 'KKAVRS',
-    'template': "The inherited getter '#{name}' is declared here in class "
-        "'#{class}'.",
-  },
-
-  'INHERITED_IMPLICIT_GETTER': {
-    'id': 'JBAMEJ',
-    'template': "The inherited getter '#{name}' is implicitly declared by this "
-        "field in class '#{class}'.",
-  },
-
-  'UNIMPLEMENTED_METHOD_ONE': {
-    'id': 'CMCLWO',
-    'template': "'#{class}' doesn't implement '#{method}' "
-        "declared in '#{declarer}'.",
-    'howToFix': "Try adding an implementation of '#{name}' or declaring "
-        "'#{class}' to be 'abstract'.",
-    'examples': [
-      """
-abstract class I {
-m();
-}
-class C implements I {}
-main() => new C();
-""",
-      """
-abstract class I {
-m();
-}
-class C extends I {}
-main() => new C();
-"""
-    ],
-  },
-
-  'UNIMPLEMENTED_METHOD': {
-    'id': 'IJSNQB',
-    'template': "'#{class}' doesn't implement '#{method}'.",
-    'howToFix': "Try adding an implementation of '#{name}' or declaring "
-        "'#{class}' to be 'abstract'.",
-    'examples': [
-      """
-abstract class I {
-m();
-}
-
-abstract class J {
-m();
-}
-
-class C implements I, J {}
-
-main() {
-new C();
-}
-""",
-      """
-abstract class I {
-m();
-}
-
-abstract class J {
-m();
-}
-
-class C extends I implements J {}
-
-main() {
-new C();
-}
-"""
-    ],
-  },
-
-  'UNIMPLEMENTED_METHOD_CONT': {
-    'id': 'KFBKPO',
-    'template': "The method '#{name}' is declared here in class '#{class}'.",
-  },
-
-  'UNIMPLEMENTED_SETTER_ONE': {
-    'id': 'QGKTEA',
-    'template': "'#{class}' doesn't implement the setter '#{name}' "
-        "declared in '#{declarer}'.",
-    'howToFix': "Try adding an implementation of '#{name}' or declaring "
-        "'#{class}' to be 'abstract'.",
-    'examples': [
-      """
-abstract class I {
-set m(_);
-}
-class C implements I {}
-class D implements I {
-set m(_) {}
-}
-main() {
-new D().m = 0;
-new C();
-}
-"""
-    ],
-  },
-
-  'UNIMPLEMENTED_SETTER': {
-    'id': 'VEEGJQ',
-    'template': "'#{class}' doesn't implement the setter '#{name}'.",
-    'howToFix': "Try adding an implementation of '#{name}' or declaring "
-        "'#{class}' to be 'abstract'.",
-    'examples': [
-      """
-abstract class I {
-set m(_);
-}
-abstract class J {
-set m(_);
-}
-class C implements I, J {}
-main() => new C();
-""",
-      """
-abstract class I {
-set m(_);
-}
-abstract class J {
-set m(_);
-}
-class C extends I implements J {}
-main() => new C();
-"""
-    ],
-  },
-
-  'UNIMPLEMENTED_EXPLICIT_SETTER': {
-    'id': 'SABABA',
-    'template': "The setter '#{name}' is declared here in class '#{class}'.",
-  },
-
-  'UNIMPLEMENTED_IMPLICIT_SETTER': {
-    'id': 'SWESAQ',
-    'template': "The setter '#{name}' is implicitly declared by this field "
-        "in class '#{class}'.",
-  },
-
-  'UNIMPLEMENTED_GETTER_ONE': {
-    'id': 'ODEPFW',
-    'template': "'#{class}' doesn't implement the getter '#{name}' "
-        "declared in '#{declarer}'.",
-    'howToFix': "Try adding an implementation of '#{name}' or declaring "
-        "'#{class}' to be 'abstract'.",
-    'examples': [
-      """
-abstract class I {
-get m;
-}
-class C implements I {}
-main() => new C();
-""",
-      """
-abstract class I {
-get m;
-}
-class C extends I {}
-main() => new C();
-"""
-    ],
-  },
-
-  'UNIMPLEMENTED_GETTER': {
-    'id': 'VHSECG',
-    'template': "'#{class}' doesn't implement the getter '#{name}'.",
-    'howToFix': "Try adding an implementation of '#{name}' or declaring "
-        "'#{class}' to be 'abstract'.",
-    'examples': [
-      """
-abstract class I {
-get m;
-}
-abstract class J {
-get m;
-}
-class C implements I, J {}
-main() => new C();
-""",
-      """
-abstract class I {
-get m;
-}
-abstract class J {
-get m;
-}
-class C extends I implements J {}
-main() => new C();
-"""
-    ],
-  },
-
-  'UNIMPLEMENTED_EXPLICIT_GETTER': {
-    'id': 'HFDJPP',
-    'template': "The getter '#{name}' is declared here in class '#{class}'.",
-  },
-
-  'UNIMPLEMENTED_IMPLICIT_GETTER': {
-    'id': 'BSCQNO',
-    'template': "The getter '#{name}' is implicitly declared by this field "
-        "in class '#{class}'.",
-  },
-
-  'INVALID_METADATA': {
-    'id': 'RKJGDE',
-    'template':
-        "A metadata annotation must be either a reference to a compile-time "
-        "constant variable or a call to a constant constructor.",
-    'howToFix':
-        "Try using a different constant value or referencing it through a "
-        "constant variable.",
-    'examples': [
-'@Object main() {}',
-'@print main() {}']
-  },
-
-  'INVALID_METADATA_GENERIC': {
-    'id': 'WEEDQD',
-    'template':
-        "A metadata annotation using a constant constructor cannot use type "
-        "arguments.",
-    'howToFix':
-        "Try removing the type arguments or referencing the constant "
-        "through a constant variable.",
-    'examples': [
-      '''
-class C<T> {
-  const C();
-}
-@C<int>() main() {}
-'''],
-  },
-
-  'EQUAL_MAP_ENTRY_KEY': {
-    'id': 'KIDLPM',
-    'template': "An entry with the same key already exists in the map.",
-    'howToFix': "Try removing the previous entry or changing the key in one "
-        "of the entries.",
-    'examples': [
-      """
-main() {
-var m = const {'foo': 1, 'foo': 2};
-}"""
-    ],
-  },
-
-  'BAD_INPUT_CHARACTER': {
-    'id': 'SHQWJY',
-    'template': "Character U+#{characterHex} isn't allowed here.",
-    'howToFix': DONT_KNOW_HOW_TO_FIX,
-    'examples': [
-      """
-main() {
-String x = ç;
-}
-"""
-    ],
-  },
-
-  'UNTERMINATED_STRING': {
-    'id': 'TRLTHK',
-    'template': "String must end with #{quote}.",
-    'howToFix': DONT_KNOW_HOW_TO_FIX,
-    'examples': [
-      """
-main() {
-return '
-;
-}
-""",
-      """
-main() {
-return \"
-;
-}
-""",
-      """
-main() {
-return r'
-;
-}
-""",
-      """
-main() {
-return r\"
-;
-}
-""",
-      """
-main() => '''
-""",
-      """
-main() => \"\"\"
-""",
-      """
-main() => r'''
-""",
-      """
-main() => r\"\"\"
-"""
-    ],
-  },
-
-  'UNMATCHED_TOKEN': {
-    'id': 'AGJKMQ',
-    'template': "Can't find '#{end}' to match '#{begin}'.",
-    'howToFix': DONT_KNOW_HOW_TO_FIX,
-    'examples': ["main(", "main(){", "main(){]}",],
-  },
-
-  'UNTERMINATED_TOKEN': {
-    'id': 'VIIXHQ',
-    'template':
-        // This is a fall-back message that shouldn't happen.
-        "Incomplete token.",
-  },
-
-  'EXPONENT_MISSING': {
-    'id': 'CXPLCR',
-    'template':
-        "Numbers in exponential notation should always contain an exponent"
-        " (an integer number with an optional sign).",
-    'howToFix': "Make sure there is an exponent, and remove any whitespace "
-        "before it.",
-    'examples': [
-      """
-main() {
-var i = 1e;
-}
-"""
-    ],
-  },
-
-  'HEX_DIGIT_EXPECTED': {
-    'id': 'GKCAGV',
-    'template': "A hex digit (0-9 or A-F) must follow '0x'.",
-    'howToFix': DONT_KNOW_HOW_TO_FIX, // Seems obvious from the error message.
-    'examples': [
-      """
-main() {
-var i = 0x;
-}
-"""
-    ],
-  },
-
-  'MALFORMED_STRING_LITERAL': {
-    'id': 'DULNSD',
-    'template':
-        r"A '$' has special meaning inside a string, and must be followed by "
-        "an identifier or an expression in curly braces ({}).",
-    'howToFix': r"Try adding a backslash (\) to escape the '$'.",
-    'examples': [
-      r"""
-main() {
-return '$';
-}
-""",
-      r'''
-main() {
-return "$";
-}
-''',
-      r"""
-main() {
-return '''$''';
-}
-""",
-      r'''
-main() {
-return """$""";
-}
-'''
-    ],
-  },
-
-  'UNTERMINATED_COMMENT': {
-    'id': 'NECJNM',
-    'template': "Comment starting with '/*' must end with '*/'.",
-    'howToFix': DONT_KNOW_HOW_TO_FIX,
-    'examples': [
-      r"""
-main() {
-}
-/*"""
-    ],
-  },
-
-  'MISSING_TOKEN_BEFORE_THIS': {
-    'id': 'AFKXGU',
-    'template': "Expected '#{token}' before this.",
-    // Consider the second example below: the parser expects a ')' before
-    // 'y', but a ',' would also have worked. We don't have enough
-    // information to give a good suggestion.
-    'howToFix': DONT_KNOW_HOW_TO_FIX,
-    'examples': ["main() => true ? 1;", "main() => foo(x: 1 y: 2);",],
-  },
-
-  'MISSING_TOKEN_AFTER_THIS': {
-    'id': 'FMUFJL',
-    'template': "Expected '#{token}' after this.",
-    // See [MISSING_TOKEN_BEFORE_THIS], we don't have enough information
-    // to give a good suggestion.
-    'howToFix': DONT_KNOW_HOW_TO_FIX,
-    'examples': [
-      "main(x) {x}",
-      """
-class S1 {}
-class S2 {}
-class S3 {}
-class A = S1 with S2, S3
-main() => new A();
-"""
-    ],
-  },
-
-  'CONSIDER_ANALYZE_ALL': {
-    'id': 'HHILSH',
-    'template': "Could not find '#{main}'.  Nothing will be analyzed.",
-    'howToFix': "Try using '--analyze-all' to analyze everything.",
-    'examples': [''],
-  },
-
-  'MISSING_MAIN': {
-    'id': 'HNAOPV',
-    'template': "Could not find '#{main}'.",
-    // No example, test uses '--analyze-only' which will produce the above
-    // message [CONSIDER_ANALYZE_ALL].  An example for a human operator
-    // would be an empty file.
-    'howToFix': "Try adding a method named '#{main}' to your program."
-  },
-
-  'MAIN_NOT_A_FUNCTION': {
-    'id': 'PIURPA',
-    'template': "'#{main}' is not a function.",
-    'howToFix': DONT_KNOW_HOW_TO_FIX, // Don't state the obvious.
-    'examples': ['var main;'],
-  },
-
-  'MAIN_WITH_EXTRA_PARAMETER': {
-    'id': 'ONOGQB',
-    'template': "'#{main}' cannot have more than two parameters.",
-    'howToFix': DONT_KNOW_HOW_TO_FIX, // Don't state the obvious.
-    'examples': ['main(a, b, c) {}'],
-  },
-
-  'COMPILER_CRASHED': {
-    'id': 'MHDWAV',
-    'template': "The compiler crashed when compiling this element.",
-  },
-
-  'PLEASE_REPORT_THE_CRASH': {
-    'id': 'UUTHXX',
-    'template': '''
-The compiler is broken.
-
-When compiling the above element, the compiler crashed. It is not
-possible to tell if this is caused by a problem in your program or
-not. Regardless, the compiler should not crash.
-
-The Dart team would greatly appreciate if you would take a moment to
-report this problem at http://dartbug.com/new.
-
-Please include the following information:
-
-* the name and version of your operating system,
-
-* the Dart SDK build number (#{buildId}), and
-
-* the entire message you see here (including the full stack trace
-below as well as the source location above).
-''',
-  },
-
-  'POTENTIAL_MUTATION': {
-    'id': 'YGNLLB',
-    'template': "Variable '#{variableName}' is not known to be of type "
-        "'#{shownType}' because it is potentially mutated in the scope for "
-        "promotion.",
-  },
-
-  'POTENTIAL_MUTATION_HERE': {
-    'id': 'ATMSVX',
-    'template': "Variable '#{variableName}' is potentially mutated here.",
-  },
-
-  'POTENTIAL_MUTATION_IN_CLOSURE': {
-    'id': 'XUAHTW',
-    'template': "Variable '#{variableName}' is not known to be of type "
-        "'#{shownType}' because it is potentially mutated within a closure.",
-  },
-
-  'POTENTIAL_MUTATION_IN_CLOSURE_HERE': {
-    'id': 'UHFXLG',
-    'template': "Variable '#{variableName}' is potentially mutated in a "
-        "closure here.",
-  },
-
-  'ACCESSED_IN_CLOSURE': {
-    'id': 'JJHKSF',
-    'template': "Variable '#{variableName}' is not known to be of type "
-        "'#{shownType}' because it is accessed by a closure in the scope for "
-        "promotion and potentially mutated in the scope of "
-        "'#{variableName}'.",
-  },
-
-  'ACCESSED_IN_CLOSURE_HERE': {
-    'id': 'KMJVEA',
-    'template': "Variable '#{variableName}' is accessed in a closure here.",
-  },
-
-  'NOT_MORE_SPECIFIC': {
-    'id': 'EJHQAG',
-    'template': "Variable '#{variableName}' is not shown to have type "
-        "'#{shownType}' because '#{shownType}' is not more specific than the "
-        "known type '#{knownType}' of '#{variableName}'.",
-  },
-
-  'NOT_MORE_SPECIFIC_SUBTYPE': {
-    'id': 'APICDL',
-    'template': "Variable '#{variableName}' is not shown to have type "
-        "'#{shownType}' because '#{shownType}' is not a subtype of the "
-        "known type '#{knownType}' of '#{variableName}'.",
-  },
-
-  'NOT_MORE_SPECIFIC_SUGGESTION': {
-    'id': 'FFNCJX',
-    'template': "Variable '#{variableName}' is not shown to have type "
-        "'#{shownType}' because '#{shownType}' is not more specific than the "
-        "known type '#{knownType}' of '#{variableName}'.",
-    'howToFix': "Try replacing '#{shownType}' with '#{shownTypeSuggestion}'.",
-  },
-
-  'NO_COMMON_SUBTYPES': {
-    'id': 'XKJOEC',
-    'template': "Types '#{left}' and '#{right}' have no common subtypes.",
-  },
-
-  'HIDDEN_WARNINGS_HINTS': {
-    'id': 'JBAWEK',
-    'template':
-        "#{warnings} warning(s) and #{hints} hint(s) suppressed in #{uri}.",
-  },
-
-  'HIDDEN_WARNINGS': {
-    'id': 'JIYWDC',
-    'template': "#{warnings} warning(s) suppressed in #{uri}.",
-  },
-
-  'HIDDEN_HINTS': {
-    'id': 'RHNXQT',
-    'template': "#{hints} hint(s) suppressed in #{uri}.",
-  },
-
-  'PREAMBLE': {
-    'id': 'GXGWIF',
-    'template': "When run on the command-line, the compiled output might"
-        " require a preamble file located in:\n"
-        "  <sdk>/lib/_internal/js_runtime/lib/preambles.",
-  },
-
-  'INVALID_SYNC_MODIFIER': {
-    'id': 'FNYUYU',
-    'template': "Invalid modifier 'sync'.",
-    'howToFix': "Try replacing 'sync' with 'sync*'.",
-    'examples': ["main() sync {}"],
-  },
-
-  'INVALID_AWAIT_FOR': {
-    'id': 'IEYGCY',
-    'template': "'await' is only supported on for-in loops.",
-    'howToFix': "Try rewriting the loop as a for-in loop or removing the "
-        "'await' keyword.",
-    'examples': [
-      """
-main() async* {
-await for (int i = 0; i < 10; i++) {}
-}
-"""
-    ],
-  },
-
-  'INVALID_AWAIT_FOR_IN': {
-    'id': 'FIEYGC',
-    'template': "'await' is only supported in methods with an 'async' or "
-                "'async*' body modifier.",
-    'howToFix': "Try adding 'async' or 'async*' to the method body or "
-                "removing the 'await' keyword.",
-    'examples': [
-      """
-main(o) sync* {
-  await for (var e in o) {}
-}
-"""
-    ],
-  },
-
-  'INVALID_AWAIT': {
-    'id': 'IEYHYD',
-    'template': "'await' is only supported in methods with an 'async' or "
-                "'async*' body modifier.",
-    'howToFix': "Try adding 'async' or 'async*' to the method body.",
-    'examples': [
-      """
-main() sync* {
-  await null;
-}
-"""
-    ],
-  },
-
-  'INVALID_YIELD': {
-    'id': 'IPGGCY',
-    'template': "'yield' is only supported in methods with a 'sync*' or "
-                "'async*' body modifier.",
-    'howToFix': "Try adding 'sync*' or 'async*' to the method body.",
-    'examples': [
-      """
-main() async {
-  yield 0;
-}
-"""
-    ],
-  },
-
-  'ASYNC_MODIFIER_ON_ABSTRACT_METHOD': {
-    'id': 'VRISLY',
-    'template':
-        "The modifier '#{modifier}' is not allowed on an abstract method.",
-    'options': ['--enable-async'],
-    'howToFix': "Try removing the '#{modifier}' modifier or adding a "
-        "body to the method.",
-    'examples': [
-      """
-abstract class A {
-method() async;
-}
-class B extends A {
-method() {}
-}
-main() {
-A a = new B();
-a.method();
-}
-"""
-    ],
-  },
-
-  'ASYNC_MODIFIER_ON_CONSTRUCTOR': {
-    'id': 'DHCFON',
-    'template': "The modifier '#{modifier}' is not allowed on constructors.",
-    'options': ['--enable-async'],
-    'howToFix': "Try removing the '#{modifier}' modifier.",
-    'examples': [
-      """
-class A {
-A() async;
-}
-main() => new A();""",
-      """
-class A {
-A();
-factory A.a() async* {}
-}
-main() => new A.a();"""
-    ],
-  },
-
-  'ASYNC_MODIFIER_ON_SETTER': {
-    'id': 'NMJLJE',
-    'template': "The modifier '#{modifier}' is not allowed on setters.",
-    'options': ['--enable-async'],
-    'howToFix': "Try removing the '#{modifier}' modifier.",
-    'examples': [
-      """
-class A {
-set foo(v) async {}
-}
-main() => new A().foo = 0;"""
-    ],
-  },
-
-  'YIELDING_MODIFIER_ON_ARROW_BODY': {
-    'id': 'UOGLUX',
-    'template':
-        "The modifier '#{modifier}' is not allowed on methods implemented "
-        "using '=>'.",
-    'options': ['--enable-async'],
-    'howToFix': "Try removing the '#{modifier}' modifier or implementing "
-        "the method body using a block: '{ ... }'.",
-    'examples': ["main() sync* => null;", "main() async* => null;"],
-  },
-
-  // TODO(johnniwinther): Check for 'async' as identifier.
-  'ASYNC_KEYWORD_AS_IDENTIFIER': {
-    'id': 'VTWSMA',
-    'template':
-        "'#{keyword}' cannot be used as an identifier in a function body "
-        "marked with '#{modifier}'.",
-    'options': ['--enable-async'],
-    'howToFix': "Try removing the '#{modifier}' modifier or renaming the "
-        "identifier.",
-    'examples': [
-      """
-main() async {
-var await;
-}""",
-      """
-main() async* {
-var yield;
-}""",
-      """
-main() sync* {
-var yield;
-}"""
-    ],
-  },
-
-  'RETURN_IN_GENERATOR': {
-    'id': 'AWGUVF',
-    'template':
-        "'return' with a value is not allowed in a method body using the "
-        "'#{modifier}' modifier.",
-    'howToFix': "Try removing the value, replacing 'return' with 'yield' "
-        "or changing the method body modifier.",
-    'examples': [
-      """
-foo() async* { return 0; }
-main() => foo();
-""",
-      """
-foo() sync* { return 0; }
-main() => foo();
-"""
-    ],
-  },
-
-  'NATIVE_NOT_SUPPORTED': {
-    'id': 'QMMLUT',
-    'template': "'native' modifier is not supported.",
-    'howToFix': "Try removing the 'native' implementation or analyzing the "
-        "code with the --allow-native-extensions option.",
-    'examples': [
-      """
-main() native "Main";
-"""
-    ],
-  },
-
-  'DART_EXT_NOT_SUPPORTED': {
-    'id': 'JLPQFJ',
-    'template': "The 'dart-ext' scheme is not supported.",
-    'howToFix': "Try analyzing the code with the --allow-native-extensions "
-        "option.",
-    'examples': [
-      """
-import 'dart-ext:main';
-
-main() {}
-"""
-    ],
-  },
-
-  'LIBRARY_TAG_MUST_BE_FIRST': {
-    'id': 'JFUSRX',
-    'template':
-        "The library declaration should come before other declarations.",
-    'howToFix': "Try moving the declaration to the top of the file.",
-    'examples': [
-      """
-import 'dart:core';
-library foo;
-main() {}
-""",
-    ],
-  },
-
-  'ONLY_ONE_LIBRARY_TAG': {
-    'id': 'CCXFMY',
-    'template': "There can only be one library declaration.",
-    'howToFix': "Try removing all other library declarations.",
-    'examples': [
-      """
-library foo;
-library bar;
-main() {}
-""",
-      """
-library foo;
-import 'dart:core';
-library bar;
-main() {}
-""",
-    ],
-  },
-
-  'IMPORT_BEFORE_PARTS': {
-    'id': 'NSMOQI',
-    'template': "Import declarations should come before parts.",
-    'howToFix': "Try moving this import further up in the file.",
-    'examples': [
-      {
-        'main.dart': """
-library test.main;
-part 'part.dart';
-import 'dart:core';
-main() {}
-""",
-        'part.dart': """
-part of test.main;
-""",
-      }
-    ],
-  },
-
-  'EXPORT_BEFORE_PARTS': {
-    'id': 'KYJTTC',
-    'template': "Export declarations should come before parts.",
-    'howToFix': "Try moving this export further up in the file.",
-    'examples': [
-      {
-        'main.dart': """
-library test.main;
-part 'part.dart';
-export 'dart:core';
-main() {}
-""",
-        'part.dart': """
-part of test.main;
-""",
-      }
-    ],
-
-//////////////////////////////////////////////////////////////////////////////
-// Patch errors start.
-//////////////////////////////////////////////////////////////////////////////
-  },
-
-  'PATCH_RETURN_TYPE_MISMATCH': {
-    'id': 'DTOQDU',
-    'template': "Patch return type '#{patchReturnType}' does not match "
-        "'#{originReturnType}' on origin method '#{methodName}'.",
-  },
-
-  'PATCH_REQUIRED_PARAMETER_COUNT_MISMATCH': {
-    'id': 'KJUUYC',
-    'template': "Required parameter count of patch method "
-        "(#{patchParameterCount}) does not match parameter count on origin "
-        "method '#{methodName}' (#{originParameterCount}).",
-  },
-
-  'PATCH_OPTIONAL_PARAMETER_COUNT_MISMATCH': {
-    'id': 'GUTGTE',
-    'template': "Optional parameter count of patch method "
-        "(#{patchParameterCount}) does not match parameter count on origin "
-        "method '#{methodName}' (#{originParameterCount}).",
-  },
-
-  'PATCH_OPTIONAL_PARAMETER_NAMED_MISMATCH': {
-    'id': 'MCHEIC',
-    'template': "Optional parameters of origin and patch method "
-        "'#{methodName}' must both be either named or positional.",
-  },
-
-  'PATCH_PARAMETER_MISMATCH': {
-    'id': 'XISHPB',
-    'template': "Patch method parameter '#{patchParameter}' does not match "
-        "'#{originParameter}' on origin method '#{methodName}'.",
-  },
-
-  'PATCH_PARAMETER_TYPE_MISMATCH': {
-    'id': 'UGRBYD',
-    'template': "Patch method parameter '#{parameterName}' type "
-        "'#{patchParameterType}' does not match '#{originParameterType}' on "
-        "origin method '#{methodName}'.",
-  },
-
-  'PATCH_EXTERNAL_WITHOUT_IMPLEMENTATION': {
-    'id': 'WSNMKD',
-    'template': "External method without an implementation.",
-  },
-
-  'PATCH_POINT_TO_FUNCTION': {
-    'id': 'CAVBPN',
-    'template': "This is the function patch '#{functionName}'.",
-  },
-
-  'PATCH_POINT_TO_CLASS': {
-    'id': 'TWDLDX',
-    'template': "This is the class patch '#{className}'.",
-  },
-
-  'PATCH_POINT_TO_GETTER': {
-    'id': 'TRBBNY',
-    'template': "This is the getter patch '#{getterName}'.",
-  },
-
-  'PATCH_POINT_TO_SETTER': {
-    'id': 'DAXDLW',
-    'template': "This is the setter patch '#{setterName}'.",
-  },
-
-  'PATCH_POINT_TO_CONSTRUCTOR': {
-    'id': 'VYQISY',
-    'template': "This is the constructor patch '#{constructorName}'.",
-  },
-
-  'PATCH_POINT_TO_PARAMETER': {
-    'id': 'TFPAGO',
-    'template': "This is the patch parameter '#{parameterName}'.",
-  },
-
-  'PATCH_NON_EXISTING': {
-    'id': 'AWOACF',
-    'template': "Origin does not exist for patch '#{name}'.",
-  },
-
-  // TODO(ahe): Eventually, this error should be removed as it will be
-  // handled by the regular parser.
-  'PATCH_NONPATCHABLE': {
-    'id': 'WQEPJI',
-    'template': "Only classes and functions can be patched.",
-  },
-
-  'PATCH_NON_EXTERNAL': {
-    'id': 'MHLXNK',
-    'template': "Only external functions can be patched.",
-  },
-
-  'PATCH_NON_CLASS': {
-    'id': 'UIALAB',
-    'template': "Patching non-class with class patch '#{className}'.",
-  },
-
-  'PATCH_NON_GETTER': {
-    'id': 'VTNQCJ',
-    'template': "Cannot patch non-getter '#{name}' with getter patch.",
-  },
-
-  'PATCH_NO_GETTER': {
-    'id': 'XOPDHD',
-    'template': "No getter found for getter patch '#{getterName}'.",
-  },
-
-  'PATCH_NON_SETTER': {
-    'id': 'XBOMMN',
-    'template': "Cannot patch non-setter '#{name}' with setter patch.",
-  },
-
-  'PATCH_NO_SETTER': {
-    'id': 'YITARQ',
-    'template': "No setter found for setter patch '#{setterName}'.",
-  },
-
-  'PATCH_NON_CONSTRUCTOR': {
-    'id': 'TWAEQV',
-    'template': "Cannot patch non-constructor with constructor patch "
-        "'#{constructorName}'.",
-  },
-
-  'PATCH_NON_FUNCTION': {
-    'id': 'EDXBPI',
-    'template': "Cannot patch non-function with function patch "
-        "'#{functionName}'.",
-  },
-
-  'INJECTED_PUBLIC_MEMBER': {
-    'id': 'JGMXMI',
-    'template': "Non-patch members in patch libraries must be private.",
-  },
-
-  'EXTERNAL_WITH_BODY': {
-    'id': 'GAVMSQ',
-    'template':
-        "External function '#{functionName}' cannot have a function body.",
-    'options': ["--output-type=dart"],
-    'howToFix': "Try removing the 'external' modifier or the function body.",
-    'examples': [
-      """
-external foo() => 0;
-main() => foo();
-""",
-      """
-external foo() {}
-main() => foo();
-"""
-    ],
-
-//////////////////////////////////////////////////////////////////////////////
-// Patch errors end.
-//////////////////////////////////////////////////////////////////////////////
-  },
-
-  'EXPERIMENTAL_ASSERT_MESSAGE': {
-    'id': 'NENGIS',
-    'template': "Experimental language feature 'assertion with message'"
-        " is not supported.",
-    'howToFix':
-        "Use option '--assert-message' to use assertions with messages.",
-    'examples': [
-      r'''
-main() {
-int n = -7;
-assert(n > 0, 'must be positive: $n');
-}
-'''
-    ],
-  },
-
-  'IMPORT_EXPERIMENTAL_MIRRORS': {
-    'id': 'SCJYPH',
-    'template': '''
-
-****************************************************************
-* WARNING: dart:mirrors support in dart2js is experimental,
-*          and not recommended.
-*          This implementation of mirrors is incomplete,
-*          and often greatly increases the size of the generated
-*          JavaScript code.
-*
-* Your app imports dart:mirrors via:'''
-        '''
-$IMPORT_EXPERIMENTAL_MIRRORS_PADDING#{importChain}
-*
-* You can disable this message by using the --enable-experimental-mirrors
-* command-line flag.
-*
-* To learn what to do next, please visit:
-*    http://dartlang.org/dart2js-reflection
-****************************************************************
-''',
-  },
-
-  'DISALLOWED_LIBRARY_IMPORT': {
-    'id': 'OCSFJU',
-    'template': '''
-Your app imports the unsupported library '#{uri}' via:
-'''
-        '''
-$DISALLOWED_LIBRARY_IMPORT_PADDING#{importChain}
-
-Use the --categories option to support import of '#{uri}'.
-''',
-  },
-
-  'MIRRORS_LIBRARY_NOT_SUPPORT_BY_BACKEND': {
-    'id': 'JBTRRM',
-    'template': """
-dart:mirrors library is not supported when using this backend.
-
-Your app imports dart:mirrors via:"""
-        """
-$MIRRORS_NOT_SUPPORTED_BY_BACKEND_PADDING#{importChain}""",
-  },
-
-  'CALL_NOT_SUPPORTED_ON_NATIVE_CLASS': {
-    'id': 'HAULDW',
-    'template': "Non-supported 'call' member on a native class, or a "
-        "subclass of a native class.",
-  },
-
-  'DIRECTLY_THROWING_NSM': {
-    'id': 'XLTPCS',
-    'template': "This 'noSuchMethod' implementation is guaranteed to throw an "
-        "exception. The generated code will be smaller if it is "
-        "rewritten.",
-    'howToFix': "Rewrite to "
-        "'noSuchMethod(Invocation i) => super.noSuchMethod(i);'.",
-  },
-
-  'COMPLEX_THROWING_NSM': {
-    'id': 'PLCXVX',
-    'template': "This 'noSuchMethod' implementation is guaranteed to throw an "
-        "exception. The generated code will be smaller and the compiler "
-        "will be able to perform more optimizations if it is rewritten.",
-    'howToFix': "Rewrite to "
-        "'noSuchMethod(Invocation i) => super.noSuchMethod(i);'.",
-  },
-
-  'COMPLEX_RETURNING_NSM': {
-    'id': 'HUTCTQ',
-    'template': "Overriding 'noSuchMethod' causes the compiler to generate "
-        "more code and prevents the compiler from doing some optimizations.",
-    'howToFix': "Consider removing this 'noSuchMethod' implementation."
-  },
-
-  'UNRECOGNIZED_VERSION_OF_LOOKUP_MAP': {
-    'id': 'OVAFEW',
-    'template': "Unsupported version of package:lookup_map.",
-    'howToFix': DONT_KNOW_HOW_TO_FIX
-  },
-};