Bug 316195 Improve "Show view" dialog
bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/workbench/swt/Activator.java
*/
	public Bundle getBundle() {
		return context.getBundle();
	}
	public void start(BundleContext context) throws Exception {
		activator = this;
		this.context = context;
	}
	public void stop(BundleContext context) throws Exception {
		if (pkgAdminTracker != null) {
			pkgAdminTracker.close();
			pkgAdminTracker = null;
		}
	}
	/**
	 * @return the PackageAdmin service from this bundle
	 */
	public PackageAdmin getBundleAdmin() {
		if (pkgAdminTracker == null) {
			if (context == null)
				return null;
			pkgAdminTracker = new ServiceTracker(context, PackageAdmin.class
					.getName(), null);
			pkgAdminTracker.open();
		}
		return (PackageAdmin) pkgAdminTracker.getService();
	}
	/**
	 * @return the instance Location service
	 */