Bug 317405 [Model] HandledItem should be abstract
Looks like an oversight the only real types are HandledMenuItem and HandledToolItem.
bundles/org.eclipse.e4.ui.model.workbench/src/org/eclipse/e4/ui/model/application/ui/menu/impl/MenuFactoryImpl.java
* <!-- end-user-doc -->
	 * @generated
	 */
	public MRenderedMenu createRenderedMenu() {
		RenderedMenuImpl renderedMenu = new RenderedMenuImpl();
		return renderedMenu;
	}
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public MRenderedToolBar createRenderedToolBar() {
		RenderedToolBarImpl renderedToolBar = new RenderedToolBarImpl();
		return renderedToolBar;
	}
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public MToolBarContribution createToolBarContribution() {
		ToolBarContributionImpl toolBarContribution = new ToolBarContributionImpl();
		return toolBarContribution;
	}
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */