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
* <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @return the meta object for the map '<em>Properties</em>'.
	 * @see org.eclipse.e4.ui.model.application.ui.MContext#getProperties()
	 * @see #getContext()
	 * @generated
	 */
	public EReference getContext_Properties() {
		return (EReference)contextEClass.getEStructuralFeatures().get(2);
	}
	/**
	 * Returns the meta object for class '{@link org.eclipse.e4.ui.model.application.ui.MDirtyable <em>Dirtyable</em>}'.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @return the meta object for class '<em>Dirtyable</em>'.
	 * @see org.eclipse.e4.ui.model.application.ui.MDirtyable
	 * @generated
	 */
	public EClass getDirtyable() {
		return dirtyableEClass;
	}
	/**
	 * Returns the meta object for the attribute '{@link org.eclipse.e4.ui.model.application.ui.MDirtyable#isDirty <em>Dirty</em>}'.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @return the meta object for the attribute '<em>Dirty</em>'.
	 * @see org.eclipse.e4.ui.model.application.ui.MDirtyable#isDirty()
	 * @see #getDirtyable()
	 * @generated
	 */