add(new TaskDefinitionTreeNode((TaskDefinition)_object)) ;
treeModel.insertNodeInto(new TaskDefinitionTreeNode((TaskDefinition)_object, treeModel), this, getChildCount()) ;
	public void update (Observable _observable, Object _object)	{		if (_object instanceof TaskDefinition)		{			// Adding to the node			if (task.getTasks().contains(_object))			{				add(new TaskDefinitionTreeNode((TaskDefinition)_object)) ;			}		}			}