@Override
  public void setSelected(final boolean selected) {
    super.setSelected(selected);

    updateContentSelectionColor();

    for (final IZyNodeRealizerListener<?> listener : m_listeners) {
      try {
        listener.changedSelection(this);
      } catch (final Exception exception) {
        // TODO (timkornau): Log 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