Bug 277676 [UI] The workbench should create the contexts
The workbench should create contexts for the model elements, MApplication and MParts (windows, sashes, contributed parts, etc). This is not really the responsibility of the renderers. PW
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/internal/Workbench.java
}
	private void processHandlers(MPart<MPart<?>> part) {
		IEclipseContext context = part.getContext();
		if (context != null) {
			EHandlerService hs = (EHandlerService) context
					.get(EHandlerService.class.getName());
			EList<MHandler> handlers = part.getHandlers();
			for (MHandler handler : handlers) {
				String commandId = handler.getCommand().getId();
				if (handler.getObject() == null) {
					handler.setObject(contributionFactory.create(handler
							.getURI(), context));
				}
				hs.activateHandler(commandId, handler.getObject());
			}
		}
		EList<MPart<?>> children = part.getChildren();
		for (MPart<?> child : children) {
			processHandlers((MPart<MPart<?>>) child);
		}
	}
	/**
	 * Initialize a part renderer from the extension point.
	 * 
	 * @param registry
	 *            the registry for the EP
	 * @param r
	 *            the created renderer
	 * @param context
	 *            the context for the part factories