Bug 283442 [UI] Refactor the rendering class names
In order to bring the model closer to the way in which we talk about it we should re-factor it to remove references to 'factory'. For now the re-factoring will to replace 'PartRenderer' with 'PartRenderingEngine' and to replace '<xxx>Factory' with '<xxx>Renderer'. Post 0.9 we expect to change these again but this will make the initial story clearer.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/renderers/PartRenderer.java
Object parent = null;
		MPart parentME = element.getParent();
		if (parentME != null) {
			parent = parentME.getWidget();
		}
		return createGui(element, parent);
	}
	/**
	 * @param element
	 */
	public void removeGui(MPart<?> element) {
		PartFactory factory = getFactoryFor(element);
		assert (factory != null);
		MPart<?> parent = element.getParent();
		PartFactory parentFactory = parent != null ? getFactoryFor(parent) : null;
		if (parentFactory == null)
			return;
		
		
		parentFactory.childRemoved(element.getParent(), element);
		factory.disposeWidget(element);
	}
	/**
	 * @param element
	 *            an element that's been seen by createGui
	 */
	private void installLifeCycleHooks(MPart<?> element) {
		
		if (!((EObject) element).eAdapters().contains(visibilityListener))