code: public void removePropertyChangeListener (String propertyName, java.beans.PropertyChangeListener listener)
      {
          this.propertyChangeDelegate.removePropertyChangeListener(propertyName, listener);
      }
docs: Remove a PropertyChangeListener for a specific property from this node.
  This functionality has. Please note that the listener this does not remove
  a listener that has been added without specifying the property it is
  interested in.