public boolean unLinkVertexTime(){
		if(rigthTime.getID() == id){
			leftTime=this;
			rigthTime=this;
			return true;
		}else{
			leftTime.setRigthTime(rigthTime);
			rigthTime.setLeftTime(leftTime);
			leftTime = this;
			rigthTime = this;
			return false;
		}
	}