/// <summary>
/// Constructor.
/// </summary>
/// <param name="prev">Previous batch.</param>
public DataStreamerBatch(DataStreamerBatch <TK, TV> prev)
{
_prev = prev;
if (prev != null)
{
Thread.MemoryBarrier(); // Prevent "prev" field escape.
}
_fut.Listen(() => ParentsCompleted());
}
