private void xmlBuildTabGroup(NodeList group) {
		// this pass is useful for hidden dockable that need to be reassociated
		// with their tab group.
		// (tabbed dockable don't need it as this information is implicit
		// (during xml tab creation)
		for (int i = 0; i < group.getLength(); i++) {
			Element groupElt = (Element) group.item(i);
			NodeList dockables = groupElt.getElementsByTagName("Dockable");
			Dockable base = null;
			for (int j = 0; j < dockables.getLength(); j++) {
				Element dockableElt = (Element) dockables.item(j);
				Dockable d = xmlGetDockable(dockableElt);
				if (j == 0) {
					base = d;
				} else {
					addToTabbedGroup(base, d);
				}
			}
		}
	}