public IntT IndexOf <TListSource>(TListSource source, IntT start, IntT count)
where TListSource : IReadOnlyList <T>
{
if (null != source)
{
if (ListModule.CheckSegment <T, TListSource>(source, start, count))
{
return(IndexOfInternal(source, start, count));
}
// TODO
throw new ArgumentException();
}
throw new ArgumentNullException("source");
}