public SendResult ToRealSendResult()
{
var result = new SendResult { Success = _success };
if (_sentBatches != null)
{
result.SentBatches = _sentBatches.Select(x => x.AsReadOnly()).ToList().AsReadOnly();
}
if (_failedBatches != null)
{
result.FailedBatches = _failedBatches.Select(x => x.AsReadOnly()).ToList().AsReadOnly();
}
return result;
}