Bug 331010 Track Model-Element contributors
We need to track which bundle contributed an model element to e.g. look up translations in the right package
bundles/org.eclipse.e4.ui.model.workbench/src/org/eclipse/e4/ui/model/application/ui/advanced/impl/AdvancedPackageImpl.java
*/
	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;
		
		placeholderEClass = createEClass(PLACEHOLDER);
		createEReference(placeholderEClass, PLACEHOLDER__REF);
		perspectiveEClass = createEClass(PERSPECTIVE);
		createEReference(perspectiveEClass, PERSPECTIVE__WINDOWS);
		perspectiveStackEClass = createEClass(PERSPECTIVE_STACK);
		areaEClass = createEClass(AREA);
	}
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	private boolean isInitialized = false;
	/**
	 * Complete the initialization of the package and its meta-model.  This
	 * method is guarded to have no affect on any invocation but its first.
	 * <!-- begin-user-doc -->