docs: def _parse_metadata(self, meta):
          """Return the dict containing document metadata"""
          formatted_fields = self.settings['FORMATTED_FIELDS']
  
          output = collections.OrderedDict()
          for name, value in meta.items():
              name = name.lower()
              if name in formatted_fields:
                  rendered = self._render(value).strip()
                  output[name] = self.process_metadata(name, rendered)
              else:
                  output[name] = self.process_metadata(name, value)
          return output