Allow the common spec types to be in a separate document

pkg/analyzer_plugin/tool/spec/codegen_matchers.dart

 // Copyright (c) 2014, 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.
 
 /**
  * Code generation for the file "matchers.dart".
  */
 import 'dart:convert';
 
 import 'package:analyzer/src/codegen/tools.dart';
@@ skipping 88 matching lines @@
   visitApi() {
     outputHeader(year: '2017');
     writeln();
     writeln('/**');
     writeln(' * Matchers for data types defined in the analysis server API');
     writeln(' */');
     writeln("import 'package:test/test.dart';");
     writeln();
     writeln("import 'integration_tests.dart';");
     writeln();
-    for (ImpliedType impliedType in computeImpliedTypes(api).values) {
+    List<ImpliedType> impliedTypes = computeImpliedTypes(api).values.toList();
+    impliedTypes.sort((ImpliedType first, ImpliedType second) =>
+        first.camelName.compareTo(second.camelName));
+    for (ImpliedType impliedType in impliedTypes) {
       makeMatcher(impliedType);
     }
   }
 
   @override
   visitTypeEnum(TypeEnum typeEnum) {
     writeln('new MatchesEnum(${JSON.encode(context)}, [');
     indent(() {
       bool commaNeeded = false;
       for (TypeEnumValue value in typeEnum.values) {
@@ skipping 59 matching lines @@
     for (TypeDecl choice in typeUnion.choices) {
       if (commaNeeded) {
         write(', ');
       }
       visitTypeDecl(choice);
       commaNeeded = true;
     }
     write('])');
   }
 }