docs: def to_bytes(self):
          '''
          Create bytes from properties
          '''
          # Verify that properties make sense
          self.sanitize()
  
          # Start with the type
          bitstream = BitArray('uint:4=%d' % self.message_type)
  
          # Add padding
          bitstream += self._reserved1
  
          # Add the record count
          bitstream += BitArray('uint:8=%d' % len(self.records))
  
          # Add the nonce
          bitstream += BitArray(bytes=self.nonce)
  
          # Add the records
          for record in self.records:
              bitstream += record.to_bitstream()
  
          return bitstream.bytes