Stop unwanted sharing between filter closures.

pkg/analyzer/lib/src/task/options.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.
 
 library analyzer.src.task.options;
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/plugin/options.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
 import 'package:analyzer/src/generated/engine.dart';
@@ skipping 12 matching lines @@
     new ListResultDescriptor<AnalysisError>(
         'ANALYSIS_OPTIONS_ERRORS', AnalysisError.NO_ERRORS);
 
 /// `analyzer` analysis options constants.
 class AnalyzerOptions {
   static const String errors = 'errors';
   static const String exclude = 'exclude';
   static const String plugins = 'plugins';
   static const String strong_mode = 'strong-mode';
 
+  /// Ways to say `ignore`.
+  static const List<String> ignoreSynonyms = const ['ignore', 'false'];
+
   /// Supported top-level `analyzer` options.
   static const List<String> top_level = const [
     errors,
     exclude,
     plugins,
     strong_mode
   ];
 }
 
 /// Validates `analyzer` top-level options.
@@ skipping 124 matching lines @@
                 AnalysisOptionsWarningCode.UNSUPPORTED_OPTION,
                 k.span,
                 [pluginName, k.value]);
           }
         }
         //TODO(pq): consider an error if the node is not a Scalar.
       });
     }
   }
 }