Bug 259179 [TabbedProperties] TabbedPropertySheetPage extensibility option
bundles/org.eclipse.ui.views.properties.tabbed/src/org/eclipse/ui/views/properties/tabbed/TabbedPropertySheetPage.java
widgetFactory.dispose();
			widgetFactory = null;
		}
		/**
		 * Remove the part activation listener.
		 */
		if (cachedWorkbenchWindow != null) {
			cachedWorkbenchWindow.getPartService().removePartListener(
				partActivationListener);
			cachedWorkbenchWindow = null;
		}
		if (registry != null) {
			TabbedPropertyRegistryFactory.getInstance().disposeRegistry(
				contributor);
			registry = null;
		}
        
        contributor = null;
        currentSelection = null;
	}
	/**
	 * @see org.eclipse.ui.part.IPage#getControl()
	 */
	public Control getControl() {
		return tabbedPropertyComposite;
	}
	/**
	 * @see org.eclipse.ui.part.IPage#setActionBars(org.eclipse.ui.IActionBars)
	 */
	public void setActionBars(IActionBars actionBars) {