if (ChainBuilderAgent.DEBUG) {
if (ChainBuilderAgent.DEBUG > 3) {
 	private void startParamLink(FormalParameter param) { 		if (ChainBuilderAgent.DEBUG) { 			System.err.println("mouse pressing and starting link"); 			System.err.println("start param link. link state is LINKING_PARAMS"); 		}		linkOrigin = param;		link = new ParamLink();		linkLayer.addChild(link);		link.setStartParam(linkOrigin);		link.setPickable(false);		linkState = LINKING_PARAMS;			 	}