else { return false; }
return false;
	public boolean expandContainersAtLevel(int level)	{		ArrayList levelList = (ArrayList) this.levelContainers.get(new Integer(level));		if (levelList != null)		{			Iterator listIter = levelList.iterator();			while(listIter.hasNext())			{				 GEContainer node = (GEContainer) listIter.next();				 				//if (((GEStreamNode)node).getSuccesors().size() != 0)				if (node.getContainedElements().size() != 0)				 {					node.expand();				 }			}			return true;		}		else		{			return false;		}	}