code: def _decode_subelements(self):
          
          for child in self._element:
              if child.tag == self._show_tag:
                  self._show = child.text
              elif child.tag == self._status_tag:
                  self._status = child.text
              elif child.tag == self._priority_tag:
                  try:
                      self._priority = int(child.text.strip())
                      if self._priority < -128 or self._priority > 127:
                          raise ValueError
                  except ValueError:
                      raise BadRequestProtocolError(
                                              "Presence priority not an integer")
docs: Decode the stanza subelements.