private void ProcessStartEvent(object eventValue, TRequest request, Uri requestUrl)
{
  // some code removed for brevity

  var transaction = Agent.TransactionContainer.Transactions.Value;

  var span = transaction.StartSpanInternal(
    $"{RequestGetMethod(request)} {requestUrl.Host}",
    ApiConstants.TypeExternal,
    ApiConstants.SubtypeHttp);

    //
}