src/jdk.scripting.nashorn.shell/share/classes/jdk/nashorn/tools/jjs/EditObject.java

*** 23,42 ****
--- 23,52 ----
   * questions.
   */
  
  package jdk.nashorn.tools.jjs;
  
+ import java.util.Collections;
+ import java.util.HashSet;
+ import java.util.Set;
  import java.util.function.Consumer;
  import jdk.nashorn.api.scripting.AbstractJSObject;
  import jdk.nashorn.internal.runtime.JSType;
  import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
  
  /*
   * "edit" top level script function which shows an external Window
   * for editing and evaluating scripts from it.
   */
  final class EditObject extends AbstractJSObject {
+     private static final Set<String> props;
+     static {
+         final HashSet<String> s = new HashSet<>();
+         s.add("editor");
+         props = Collections.unmodifiableSet(s);
+     }
+ 
      private final Consumer<String> errorHandler;
      private final Consumer<String> evaluator;
      private final Console console;
      private String editor;
  
*** 59,68 ****
--- 69,83 ----
      public String toString() {
          return "function edit() { [native code] }";
      }
  
      @Override
+     public Set<String> keySet() {
+         return props;
+     }
+ 
+     @Override
      public Object getMember(final String name) {
          if (name.equals("editor")) {
              return editor;
          }
          return UNDEFINED;