Experimental `getDiagnostics` request (#24480).

pkg/analysis_server/tool/spec/generated/java/types/TypeHierarchyItem.java

 /*
- * Copyright (c) 2014, the Dart project authors.
+ * Copyright (c) 2015, the Dart project authors.
  *
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  *
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
  * or implied. See the License for the specific language governing permissions and limitations under
  * the License.
@@ skipping 249 matching lines @@
     builder.append(StringUtils.join(interfaces, ", ") + ", ");
     builder.append("mixins=");
     builder.append(StringUtils.join(mixins, ", ") + ", ");
     builder.append("subclasses=");
     builder.append(StringUtils.join(subclasses, ", "));
     builder.append("]");
     return builder.toString();
   }
 
 }