@Override
  public void setUpdater(final IRealizerUpdater<?> updater) {
    m_updater = updater;

    if (updater != null) {
      updater.setRealizer(this);
    }
  }
Returns the user data associated with the realizer.

@return The user data associated with the realizer.
java/zylib/src/main/java/com/google/security/zynamics/zylib/yfileswrap/gui/zygraph/realizers/ZyGroupNodeRealizer.java