if(_side instanceof JTabbedPane) {
if(_bottom instanceof JTabbedPane) {
	public boolean setComponentVisible(Container c) {		if(_bottomSet.contains(c)) {			toggleBottomPane(true);			if(_side instanceof JTabbedPane) {				((JTabbedPane) _bottom).setSelectedIndex(((JTabbedPane) _bottom).indexOfComponent(c));			}			return true;		} else if (_centerSet.contains(c)) {			if(_center instanceof JTabbedPane) {				((JTabbedPane) _center).setSelectedIndex(((JTabbedPane) _center).indexOfComponent(c));			}			return true;		} else if (_sideSet.contains(c)) {			toggleSidePane(true);			if(_side instanceof JTabbedPane) {				((JTabbedPane) _side).setSelectedIndex(((JTabbedPane) _side).indexOfComponent(c));			}			return true;		}		return false;	}