Bug 317073 Make Logging stuff available on a per class configuration
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/E4Workbench.java
}
			if (renderer == null) {
				Logger logger = (Logger) appContext.get(Logger.class.getName());
				logger.error("Failed to create the presentation engine for URI: " + presentationURI); 
			}
		}
		if (renderer != null) {
			renderer.run(uiRoot, appContext);
		}
	}
	private void init(MApplication appElement) {
		Activator.trace(Policy.DEBUG_WORKBENCH, "init() workbench", null); 
		E4CommandProcessor.processCommands(appElement.getContext(), appElement.getCommands());
		E4CommandProcessor.processBindings(appElement.getContext(), appElement);
		
		processHierarchy(appElement);
	}
	/**
	 * @return
	 * @return
	 */
	public boolean close() {
		if (renderer != null) {
			renderer.stop();
		}
		return true;
	}
	/*
	 * (non-Javadoc)
	 *