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
public static final String eNAME = "ui"; 
	/**
	 * The package namespace URI.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public static final String eNS_URI = "http://www.eclipse.org/ui/2010/UIModel/application/ui"; 
	/**
	 * The package namespace name.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public static final String eNS_PREFIX = "ui"; 
	/**
	 * The singleton instance of the package.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public static final UiPackageImpl eINSTANCE = org.eclipse.e4.ui.model.application.ui.impl.UiPackageImpl.init();
	/**
	 * The meta object id for the '{@link org.eclipse.e4.ui.model.application.ui.impl.ContextImpl <em>Context</em>}' class.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see org.eclipse.e4.ui.model.application.ui.impl.ContextImpl
	 * @see org.eclipse.e4.ui.model.application.ui.impl.UiPackageImpl#getContext()
	 * @generated
	 */