public override void VisitPartialFieldContents(System.ReadOnlySpan <byte> chunk)
 {
     if (row > 0)
     {
         chunk.CopyTo(bytes.AsSpan(bytesUsed, chunk.Length));
         bytesUsed += chunk.Length;
     }
 }
        public override void VisitEndOfField(System.ReadOnlySpan <byte> chunk)
        {
            if (bytesUsed != 0)
            {
                chunk.CopyTo(bytes.AsSpan(bytesUsed, chunk.Length));
                chunk     = new ReadOnlySpan <byte>(bytes, 0, bytesUsed + chunk.Length);
                bytesUsed = 0;
            }
            var str = Encoding.UTF8.GetString(chunk);

            ordinal++;
        }