public IJavaSearchScope createJavaSearchScope(IResource[] resources) { if (resources == null)
public IJavaSearchScope createJavaSearchScope(IWorkingSet[] workingSets, boolean includeJRE) { if (workingSets == null || workingSets.length < 1)
	public IJavaSearchScope createJavaSearchScope(IResource[] resources) {		if (resources == null)			return EMPTY_SCOPE;		Set javaElements= new HashSet(resources.length);		addJavaElements(javaElements, resources);		return createJavaSearchScope(javaElements);	}