Bug 316195 Improve "Show view" dialog
bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/workbench/swt/Activator.java
public static final String PI_RENDERERS = "org.eclipse.e4.ui.workbench.swt"; 
	private BundleContext context;
	private ServiceTracker pkgAdminTracker;
	private ServiceTracker locationTracker;
	private static Activator activator;
	private ServiceTracker debugTracker;
	private DebugTrace trace;
	/**
	 * Get the default activator.
	 * 
	 * @return a BundleActivator
	 */
	public static Activator getDefault() {
		return activator;
	}
	/**
	 * @return this bundles context
	 */
	public BundleContext getContext() {
		return context;
	}
	/**
	 * @return the bundle object