Bug 316298 [Compatibility] Support o.e.ui.menus visibleWhen
We need support in MCoreExpression for entire expressions created by the WorkbenchMenuService. They don't often use ReferenceExpressions to core expression definitions. PW
bundles/org.eclipse.e4.ui.model.workbench/src/org/eclipse/e4/ui/model/application/ui/impl/UiPackageImpl.java
/**
		 * The meta object literal for the '<em><b>Input URI</b></em>' attribute feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public static final EAttribute INPUT__INPUT_URI = eINSTANCE.getInput_InputURI();
		/**
		 * The meta object literal for the '{@link org.eclipse.e4.ui.model.application.ui.impl.UIElementImpl <em>UI Element</em>}' class.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @see org.eclipse.e4.ui.model.application.ui.impl.UIElementImpl
		 * @see org.eclipse.e4.ui.model.application.ui.impl.UiPackageImpl#getUIElement()
		 * @generated
		 */
		public static final EClass UI_ELEMENT = eINSTANCE.getUIElement();
		/**
		 * The meta object literal for the '<em><b>Widget</b></em>' attribute feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public static final EAttribute UI_ELEMENT__WIDGET = eINSTANCE.getUIElement_Widget();
		/**
		 * The meta object literal for the '<em><b>Renderer</b></em>' attribute feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public static final EAttribute UI_ELEMENT__RENDERER = eINSTANCE.getUIElement_Renderer();