Akka.Persistence.Sql.Common.Journal.JournalDbEngine.ReadHighestSequenceNrAsync C# (CSharp) Метод

        public async Task<long> ReadHighestSequenceNrAsync(string persistenceId, long fromSequenceNr)
        {
            using (var connection = CreateDbConnection())
            {
                await connection.OpenAsync();

                var sqlCommand = QueryBuilder.SelectHighestSequenceNr(persistenceId);
                CompleteCommand(sqlCommand, connection);

                var seqNr = await sqlCommand.ExecuteScalarAsync(_pendingRequestsCancellation.Token);
                return seqNr is long ? Convert.ToInt64(seqNr) : 0L;
            }
        }

 public override Task <long> ReadHighestSequenceNrAsync(string persistenceId, long fromSequenceNr)
 {
     return(DbEngine.ReadHighestSequenceNrAsync(persistenceId, fromSequenceNr));
 }