Bug 282733 Active parts aren't set correctly in events
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/renderers/PartFactory.java
if (result == null) {
			result = part.getContext();
		}
		return result;
	}
	/**
	 * Activate the part in the hierarchy. This should either still be internal
	 * or be a public method somewhere else.
	 * 
	 * @param part
	 */
	public void activate(MPart<?> part) {
		MPart<MPart<?>> parent = (MPart<MPart<?>>) part.getParent();
		IEclipseContext partContext = part.getContext();
		while (parent != null) {
			IEclipseContext parentContext = parent.getContext();
			if (parent.getActiveChild() != part)
				parent.setActiveChild(part);
			if (parentContext != null) {
				parentContext.set(IServiceConstants.ACTIVE_CHILD, partContext);
				partContext = parentContext;
			}
			part = parent;
			parent = (MPart<MPart<?>>) parent.getParent();
		}
	}
	public void removeGui(MPart element, Object widget) {
	}
}