if (ChainBuilderAgent.DEBUG)
if (ChainBuilderAgent.DEBUG > 3)
	private void mousePressedLink(PNode node) {		if (linkState != LINK_CHANGING_POINT) {			selectedLink = (Link) node;			selectedLink.setSelected(true);			if (ChainBuilderAgent.DEBUG)				System.err.println("mouse pressed on a link when not changing. link state is NOT_LINKING");			linkState = NOT_LINKING;		}	}