Akka.Persistence.Sql.Common.Snapshot.SqlSnapshotStore.LoadAsync C# (CSharp) Метод

        protected override async Task<SelectedSnapshot> LoadAsync(string persistenceId, SnapshotSelectionCriteria criteria)
        {
            using (var connection = CreateDbConnection())
            {
                await connection.OpenAsync();

                var sqlCommand = QueryBuilder.SelectSnapshot(persistenceId, criteria.MaxSequenceNr, criteria.MaxTimeStamp);
                CompleteCommand(sqlCommand, connection);
                
                var reader = await sqlCommand.ExecuteReaderAsync(_pendingRequestsCancellation.Token);
                try
                {
                    return reader.Read() ? QueryMapper.Map(reader) : null;
                }
                finally
                {
                    reader.Close();
                }
            }
        }