Read Intl.message examples argument as a map, not a string

pkg/intl/lib/src/intl_message.dart

 // Copyright (c) 2013, 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.
 
 /**
  * This provides classes to represent the internal structure of the
  * arguments to `Intl.message`. It is used when parsing sources to extract
  * messages or to generate code for message substitution. Normal programs
  * using Intl would not import this library.
  *
@@ skipping 16 matching lines @@
  * 'This is plural (', a VariableSubstitution for `num`. amd a LiteralString
  * for '.)'.
  *
  * This representation isn't used at runtime. Rather, we read some format
  * from a translation file, parse it into these objects, and they are then
  * used to generate the code representation above.
  */
 library intl_message;
 
 import 'package:analyzer/analyzer.dart';
+import 'package:json/json.dart' as json;
 
 /** A default function for the [Message.expanded] method. */
 _nullTransform(msg, chunk) => chunk;
 
 /**
  * An abstract superclass for Intl.message/plural/gender calls in the
  * program's source text. We
  * assemble these into objects that can be used to write out some translation
  * format and can also print themselves into code.
  */
@@ skipping 261 matching lines @@
   void addPieces(List<Message> messages) {
     for (var each in messages) {
       messagePieces.add(Message.from(each, this));
     }
   }
 
   /** The description provided in the Intl.message call. */
   String description;
 
   /** The examples from the Intl.message call */
-  String examples;
+  Map<String, dynamic> get examples => _examples;
+  void set examples(x) {
+    var map = json.parse(x);
+    for (var key in map.keys.toList()) {
+      map[key.toUpperCase()] = map[key];
+    }
+  }
+
+  Map<String, dynamic> _examples = const {};
 
   /**
    * The name, which may come from the function name, from the arguments
    * to Intl.message, or we may just re-use the message.
    */
   String _name;
 
   /**
    * A placeholder for any other identifier that the translation format
    * may want to use.
@@ skipping 332 matching lines @@
     out.write('(');
     out.write(mainArgument);
     var args = codeAttributeNames;
     out.write(", {");
     args.fold(out, (buffer, arg) => buffer..write(
         "'$arg': '${this[arg].toCode()}', "));
     out.write("})}");
     return out.toString();
   }
 }