Fix for issue 22560

pkg/analyzer/lib/src/generated/ast.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.ast;
 
 import 'dart:collection';
@@ skipping 4407 matching lines @@
  *
  * > classTypeAlias ::=
  * >     [SimpleIdentifier] [TypeParameterList]? '=' 'abstract'? mixinApplication
  * >
  * > mixinApplication ::=
  * >     [TypeName] [WithClause] [ImplementsClause]? ';'
  *
  * Deprecated: This class captures obsolete syntax that is no longer part of the
  * Dart language.
  */
-@deprecated
 class ClassTypeAlias extends TypeAlias {
   /**
    * The name of the class being declared.
    */
   SimpleIdentifier _name;
 
   /**
    * The type parameters for the class, or `null` if the class does not have any
    * type parameters.
    */
@@ skipping 15678 matching lines @@
   }
 
   @override
   accept(AstVisitor visitor) => visitor.visitYieldStatement(this);
 
   @override
   void visitChildren(AstVisitor visitor) {
     _safelyVisitChild(_expression, visitor);
   }
 }