Bug 92344 [call hierarchy] JavaModelException when accessing removed type
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/util/JavadocHelpContext.java
public static void displayHelp(String contextId, Object[] selected) throws CoreException {
		IContext context= HelpSystem.getContext(contextId);
		if (context != null) {
			if (selected != null && selected.length > 0) {
				context= new JavadocHelpContext(context, selected);
			}
			PlatformUI.getWorkbench().getHelpSystem().displayHelp(context);
		}
	}
	
	
	private static class JavaUIHelpResource implements IHelpResource {