internal ConcatNAsyncIterator(ConcatAsyncIterator <TSource> previousConcat, IAsyncEnumerable <TSource> next, int nextIndex)
{
Debug.Assert(nextIndex >= 2);
_previousConcat = previousConcat;
_next = next;
_nextIndex = nextIndex;
}
internal ConcatNAsyncIterator(ConcatAsyncIterator <TSource> previousConcat, IAsyncEnumerable <TSource> next, int nextIndex)
{
Debug.Assert(previousConcat != null);
Debug.Assert(next != null);
Debug.Assert(nextIndex >= 2);
this.previousConcat = previousConcat;
this.next = next;
this.nextIndex = nextIndex;
}