docs: void firePropertyDataChanged(TreeDataEvent event) {
  		if (this.nodeListeners != null) {
  			for (final TreeNodeListener listener : this.nodeListeners) {
  				if (listener != null) {
  					listener.treeNodeDataChanged(event);
  				}
  			}
  		}
  		final N parent = getParentNode();
  		if (parent != null) {
  			parent.firePropertyDataChanged(event);
  		}
  	}