* 
	 * @since 1.1.2
	 */
	public void addToTabbedGroup(Dockable base, Dockable newTab) {// 2005/07/13
		/*
		 * this method is called when a dockable is added to a
		 * dockableTabbedContainer
		 */
		LinkedList<Dockable> group = tabbedGroups.get(base);
		if (group == null) {
			group = new LinkedList();
			group.add(base);
			tabbedGroups.put(base, group);
		}
		if (!group.contains(newTab)) {
			group.add(newTab);
			tabbedGroups.put(newTab, group);
		}
	}