if (ChainBuilderAgent.DEBUG) System.err.println("a key was pressed ");
	public void keyPressed(PInputEvent e) {		//System.err.println("a key was pressed ");		int key = e.getKeyCode();		if (key != KeyEvent.VK_DELETE && key != KeyEvent.VK_BACK_SPACE)			return;					if (selectedLink != null) {			selectedLink.remove();			selectedLink = null;		}		else if (selectedModule != null) {			selectedModule.remove();			selectedModule = null;		}		canvas.updateSaveStatus();	}