Bug 233285 [TabbedProperties] Adopt API tooling
The tabbed properties plug-in is still not API tooling enabled.
bundles/org.eclipse.ui.views.properties.tabbed/src/org/eclipse/ui/views/properties/tabbed/TabbedPropertySheetPage.java
extends Page
	implements IPropertySheetPage, ILabelProviderListener {
	
	private TabbedPropertyComposite tabbedPropertyComposite;
	private TabbedPropertySheetWidgetFactory widgetFactory;
	private ITabbedPropertySheetPageContributor contributor;
	private TabbedPropertyRegistry registry;
	private ITabbedPropertySheetPageContributor selectionContributor = null;
	/**
	 * The currently active contributor id, which may not match the contributor
	 * id from the workbench part that created this instance.
	 */