int releaseNode(int view, int selectedNode,boolean selectDisappeared){    	
    	  Integer p = this.persistence.get(view);
    	  if ((p ==1||selectDisappeared) && parent.dist(this.x,this.y,parent.mouseX,parent.mouseY)<=RADIUS && this.id!=selectedNode){    		 
    		  return this.id;   		  
    	  }    	 
    	  return -1;
      }