protected override void PreparePersistenceId(string pid)
        {
            var rowRange = RowRange.Closed(new BigtableByteString($"{pid}"), new BigtableByteString($"{pid}~"));

            BigtableTestUtils.DeleteRows(TableName, rowRange);
        }
        private void ClearTable()
        {
            var rowRange = RowRange.Closed(new BigtableByteString($"{Pid}"), new BigtableByteString($"{Pid}~"));

            BigtableTestUtils.DeleteRows(TableName, rowRange);
        }