private Dockable xmlGetDockable(Element dockableElt) {
		Element key = (Element) dockableElt.getElementsByTagName("Key").item(0);
		String name = key.getAttribute("dockName");
		Dockable dockable = context.getDockableByKey(name);
		if (dockable == null) {
			throw new NullPointerException("Dockable " + name
					+ " not registered");
		}

		return dockable;
	}