Bug 317423 [Model] Get rid of the AbstractContainers like PartDescriptorContainer, ...
Some of the containers we defined where solely used by Application and our old Model-Contribution story and hence are "useless" now: * PartDescriptorContainer * BindingTableContainer Stuff I'm unsure why we have containers are: * TrimContributions * MenuContributions * ToolBarContributions but to me it looks like they are only used by Application-class so beside that I guess they are abstract, right?
bundles/org.eclipse.e4.ui.model.workbench.edit/src/org/eclipse/e4/ui/model/application/ui/menu/provider/MenuItemProviderAdapterFactory.java
* <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public Adapter createMenuContributionsAdapter() {
		if (menuContributionsItemProvider == null) {
			menuContributionsItemProvider = new MenuContributionsItemProvider(this);
		}
		return menuContributionsItemProvider;
	}
	/**
	 * This keeps track of the one adapter used for all {@link org.eclipse.e4.ui.model.application.ui.menu.MRenderedMenu} instances.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected RenderedMenuItemProvider renderedMenuItemProvider;
	/**
	 * This creates an adapter for a {@link org.eclipse.e4.ui.model.application.ui.menu.MRenderedMenu}.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public Adapter createRenderedMenuAdapter() {
		if (renderedMenuItemProvider == null) {
			renderedMenuItemProvider = new RenderedMenuItemProvider(this);
		}
		return renderedMenuItemProvider;
	}