internal ExtendDictionaryStartFromEnumerator(ThickIndex index, int start, IterationOrder order)
#endif
                : base(index.GetDictionaryEnumerator(null, null, order))
            {
                this.index = index;
                this.start = start;
                this.order = order;
                Reset();
            }
 internal ExtendDictionaryStartFromEnumerator(ThickIndex <K, V> index, int start, IterationOrder order)