*** old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.graph/src/org/graalvm/compiler/graph/CachedGraph.java	Mon Mar 20 17:37:58 2017
--- new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.graph/src/org/graalvm/compiler/graph/CachedGraph.java	Mon Mar 20 17:37:58 2017

*** 20,32 ****
--- 20,33 ----
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  package org.graalvm.compiler.graph;
  
  import java.util.Map;
  import java.util.function.Consumer;
  
+ import org.graalvm.util.UnmodifiableEconomicMap;
+ 
  /**
   * This class is a container of a graph that needs to be readonly and optionally a lazily created
   * mutable copy of the graph.
   */
  public final class CachedGraph<G extends Graph> {

*** 57,67 ****
--- 58,68 ----
      public boolean hasMutableCopy() {
          return mutableCopy != null;
      }
  
      @SuppressWarnings("unchecked")
!     public G getMutableCopy(Consumer<UnmodifiableEconomicMap<Node, Node>> duplicationMapCallback) {
          if (!hasMutableCopy()) {
              mutableCopy = (G) readonlyCopy.copy(duplicationMapCallback);
          }
          return mutableCopy;
      }