docs: def _setup_serializers(self):
          """
          Auto set the return serializer based on Accept headers
          http://docs.webob.org/en/latest/reference.html#header-getters
  
          Intersection of requested types and supported types tells us if we
          can in fact respond in one of the request formats
          """
          acceptable_offers = self.request.accept.acceptable_offers(self.response.supported_mime_types)
          if len(acceptable_offers) > 0:
              best_accept_match = acceptable_offers[0][0]
          else:
              best_accept_match = self.response.default_serializer.content_type()
  
          # best_accept_match = self.request.accept.best_match(
          #     self.response.supported_mime_types,
          #     default_match=self.response.default_serializer.content_type()
          # )
  
          self.logger.info("%s determined as best match for accept header: %s" % (
              best_accept_match,
              self.request.accept
          ))
  
          # if content_type is not acceptable it will raise UnsupportedVocabulary
          self.response.content_type = best_accept_match