/// <summary>Implementation of <see cref="IEnumerator.Reset()"/>.</summary>
public void Reset()
{
foreach (IEnumerable <T> enumerable in Enumerables)
{
Enumerators.Enqueue(enumerable.GetEnumerator());
}
CurrentEnumerator = Enumerators.Dequeue();
}
void MoveEnumerator() => CurrentEnumerator = Enumerators.Dequeue();