if((jcpPanel.get2DHub().getRGroupHandler()==null)) {
JOptionPane.showMessageDialog(jcpPanel, GT.get("There is no R-group defined"));
return;
}
rGroupHandler=hub.getRGroupHandler();
hub.unsetRGroupHandler();
jcpPanel.get2DHub().updateView();
}
/* User has indicated that a certain atom in a substituent needs to become attachment point 1 or 2 */