Bug 259179 [TabbedProperties] TabbedPropertySheetPage extensibility option
bundles/org.eclipse.ui.views.properties.tabbed/src/org/eclipse/ui/views/properties/tabbed/TabbedPropertySheetPage.java
if (target != null) {
				Composite tabComposite = (Composite) tabToComposite.get(target);
				if (tabComposite != null) {
					target.aboutToBeHidden();
					tabComposite.setVisible(false);
				}
			}
		}
	}
	/**
	 * create a new tabbed property sheet page.
	 * 
	 * @param tabbedPropertySheetPageContributor
	 *            the tabbed property sheet page contributor.
	 */
	public TabbedPropertySheetPage(
			ITabbedPropertySheetPageContributor tabbedPropertySheetPageContributor) {
		this(tabbedPropertySheetPageContributor, true);
	}
	
	/**
	 * create a new tabbed property sheet page.
	 *
	 * @param tabbedPropertySheetPageContributor
	 *            the tabbed property sheet page contributor.	  
	 * @param showTitleBar
	 *            boolean indicating if the title bar should be shown; 
	 *            default value is <code>true</code> 	
	 * @since 3.5
	 */