Start analyzing LibraryUnitTarget(s) from BuildLibraryElementTask.

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 1623 matching lines @@
       cloneNode(node.body));
 
   @override
   WithClause visitWithClause(WithClause node) => new WithClause(
       cloneToken(node.withKeyword), cloneNodeList(node.mixinTypes));
 
   @override
   YieldStatement visitYieldStatement(YieldStatement node) => new YieldStatement(
       cloneToken(node.yieldKeyword), cloneToken(node.star),
       cloneNode(node.expression), cloneToken(node.semicolon));
+
+  /**
+   * Return a clone of the given [node].
+   */
+  static AstNode clone(AstNode node) {
+    return node.accept(new AstCloner());
+  }
 }
 
 /**
  * An AstVisitor that compares the structure of two AstNodes to see whether they
  * are equal.
  */
 class AstComparator implements AstVisitor<bool> {
   /**
    * The AST node with which the node being visited is to be compared. This is
    * only valid at the beginning of each visit method (until [isEqualNodes] is
@@ skipping 18435 matching lines @@
   }
 
   @override
   accept(AstVisitor visitor) => visitor.visitYieldStatement(this);
 
   @override
   void visitChildren(AstVisitor visitor) {
     _safelyVisitChild(_expression, visitor);
   }
 }