docs: def data_to_bytes(self, data_element, encoding=None):
          """
          Converts the given data element into a string representation using
          the :method:`data_to_string` method and encodes the resulting
          text with the given encoding.
          """
          if encoding is None:
              encoding = self.encoding
          text = self.data_to_string(data_element)
          return bytes_(text, encoding=encoding)