Bug 327585 Commands, Handlers, and keybindings should use leaf lookup
bundles/org.eclipse.e4.ui.services/src/org/eclipse/e4/ui/internal/services/ContextContextService.java
private static final String CONTEXT_PREFIX = "CTX_";
	static final String LOCAL_CONTEXTS = "localContexts";
	private IEclipseContext eclipseContext;
	private ContextManager contextManager;
	public ContextContextService(IEclipseContext context) {
		eclipseContext = context;
		contextManager = (ContextManager) context.get(ContextManager.class
				.getName());
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.e4.ui.services.EContextService#activateContext(java.lang.