Bug 279658 [UI] ResourceUtility has unused methods
In org.eclipse.e4.ui.workbench.swt.ResourceUtility, the methods - getGradientColors() - getColor() and field - private ColorRegistry COLOR_REGISTRY all appear unused. In a config with CSS, it handles gradients, colors, and the color registry (although the latter is worth discussing), so I'm not sure the purpose of the methods here.
bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/workbench/swt/internal/PartRenderingEngine.java
if (renderer != null)
					renderer.hideChild(changedElement, removed);
			}
		}
	};
	private IEclipseContext appContext;
	protected Shell testShell;
	protected MApplication theApp;
	@Inject
	@Optional
	protected IEventBroker eventBroker;
	@Inject
	EModelService modelService;
	@Inject
	protected Logger logger;
	@Inject
	public PartRenderingEngine(
			@Named(E4Workbench.RENDERER_FACTORY_URI) @Optional String factoryUrl) {
		if (factoryUrl == null) {
			factoryUrl = defaultFactoryUrl;
		}
		this.factoryUrl = factoryUrl;
	}
	/**
	 * Initialize a part renderer from the extension point.
	 * 
	 * @param context
	 *            the context for the part factories
	 */
	@PostConstruct