docs: def get_POST_data(self):
          """
          Returns:
              dict: POST data, which can be sent to webform using \
                    :py:mod:`urllib` or similar library
          """
          self._postprocess()
  
          # some fields need to be remapped (depends on type of media)
          self._apply_mapping(
              self.mapping.get(self._POST["P0502010__b"], self.mapping["else"])
          )
  
          self._check_required_fields()
  
          return self._POST