fix for getting node for class element

pkg/analyzer/lib/src/generated/element.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.element;
 
 import 'dart:collection';
@@ skipping 681 matching lines @@
    */
   void set mixinErrorsReported(bool value) {
     setModifier(Modifier.MIXIN_ERRORS_REPORTED, value);
   }
 
   @override
   AstNode get node {
     if (isEnum) {
       return getNodeMatching((node) => node is EnumDeclaration);
     } else {
-      return getNodeMatching((node) => node is ClassDeclaration);
+      return getNodeMatching((node) => node is ClassDeclaration || node is ClassTypeAlias);
     }
   }
 
   /**
    * Set whether this class is defined by a typedef construct.
    */
   void set typedef(bool isTypedef) {
     setModifier(Modifier.TYPEDEF, isTypedef);
   }
 
@@ skipping 9719 matching lines @@
     // void <: void (by reflexivity)
     // bottom <: void (as bottom is a subtype of all types).
     // void <: dynamic (as dynamic is a supertype of all types)
     return identical(type, this) || type.isDynamic;
   }
 
   @override
   VoidTypeImpl substitute2(
       List<DartType> argumentTypes, List<DartType> parameterTypes) => this;
 }