public override bool TryWrite(ref ResizableMemory <byte> writer, Utf8String value, PropertyMap propMap = null)
 {
     if (value is null)
     {
         return(EtfWriter.TryWriteNull(ref writer));
     }
     else
     {
         return(EtfWriter.TryWrite(ref writer, value));
     }
 }
 public override bool TryWrite(ref ResizableMemory <byte> writer, double value, PropertyMap propMap = null)
 => EtfWriter.TryWrite(ref writer, value, _format);