ERXArrayUtilities.sortedArraySortedWithKey(eos, key, EOSortOrdering.CompareCaseInsensitiveAscending);
ERXArrayUtilities.sortArrayWithKey(eos, key, EOSortOrdering.CompareCaseInsensitiveAscending);
    public static void sortEOsUsingSingleKey(NSMutableArray eos, String key) {        ERXArrayUtilities.sortedArraySortedWithKey(eos, key, EOSortOrdering.CompareCaseInsensitiveAscending);    }