src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.phases.common/src/org/graalvm/compiler/phases/common/util/HashSetNodeEventListener.java

@@ -35,11 +35,11 @@
 
 /**
  * A simple {@link NodeEventListener} implementation that accumulates event nodes in a
  * {@link HashSet}.
  */
-public class HashSetNodeEventListener implements NodeEventListener {
+public class HashSetNodeEventListener extends NodeEventListener {
 
     private final EconomicSet<Node> nodes;
     private final Set<NodeEvent> filter;
 
     /**

@@ -66,11 +66,11 @@
         filter.remove(e);
         return this;
     }
 
     @Override
-    public void event(NodeEvent e, Node node) {
+    public void changed(NodeEvent e, Node node) {
         if (filter.contains(e)) {
             nodes.add(node);
             if (node instanceof IndirectCanonicalization) {
                 for (Node usage : node.usages()) {
                     nodes.add(usage);