Bug 279452 [Compatibility] Parameterized command mechanism support
Parameterized commands like showView need to be able to access their parameters (like the view ID) PW
bundles/org.eclipse.e4.ui.model.workbench/src/org/eclipse/e4/ui/model/internal/application/ApplicationPackageImpl.java
public ApplicationFactory getApplicationFactory() {
		return (ApplicationFactory)getEFactoryInstance();
	}
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	private boolean isCreated = false;
	/**
	 * Creates the meta-model objects for the package.  This method is
	 * guarded to have no affect on any invocation but its first.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void createPackageContents() {
		if (isCreated) return;
		isCreated = true;
		
		mApplicationElementEClass = createEClass(MAPPLICATION_ELEMENT);
		createEAttribute(mApplicationElementEClass, MAPPLICATION_ELEMENT__OWNER);
		createEAttribute(mApplicationElementEClass, MAPPLICATION_ELEMENT__ID);
		mApplicationEClass = createEClass(MAPPLICATION);
		createEReference(mApplicationEClass, MAPPLICATION__WINDOWS);
		createEReference(mApplicationEClass, MAPPLICATION__COMMAND);
		createEAttribute(mApplicationEClass, MAPPLICATION__CONTEXT);
		mPartEClass = createEClass(MPART);
		createEReference(mPartEClass, MPART__MENU);
		createEReference(mPartEClass, MPART__TOOL_BAR);