@Override
  public void addListener(final IZyNodeRealizerListener<?> listener) {
    m_listeners.addListener(listener);
  }
Adds a listener that is notified about changes in the node realizer.

@param listener The listener object to add.
java/zylib/src/main/java/com/google/security/zynamics/zylib/yfileswrap/gui/zygraph/realizers/ZyNodeRealizer.java