Display synthetic nodes on status page

pkg/analysis_server/lib/src/status/ast_writer.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 analysis_server.src.status.ast_writer;
 
 import 'dart:collection';
 
 import 'package:analysis_server/src/status/tree_writer.dart';
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 143 matching lines @@
    * Write a representation of the given [node] to the buffer.
    */
   void _writeNode(AstNode node) {
     indent();
     buffer.write(node.runtimeType);
     buffer.write(' <span style="color:gray">[');
     buffer.write(node.offset);
     buffer.write('..');
     buffer.write(node.offset + node.length - 1);
     buffer.write(']</span>');
+    if (node.isSynthetic) {
+      buffer.write(' (synthetic)');
+    }
     buffer.write('<br>');
   }
 }