public void add(Preference preference) { final Control control= preference.getControl(); if (control != null) add(control);
public void add(Control control) { control.addFocusListener(this); fItemList.add(fIndex, control); fItemMap.put(control, new Integer(fIndex++));
		public void add(Preference preference) {			final Control control= preference.getControl();			if (control != null) 				add(control);		}