code: def get_request_feature(self, name):
          
          if '[]' in name:
              # array-type
              return self.request.query_params.getlist(
                  name) if name in self.features else None
          elif '{}' in name:
              # object-type (keys are not consistent)
              return self._extract_object_params(
                  name) if name in self.features else {}
          else:
              # single-type
              return self.request.query_params.get(
                  name) if name in self.features else None
docs: Parses the request for a particular feature.
  
          Arguments:
            name: A feature name.
  
          Returns:
            A feature parsed from the URL if the feature is supported, or None.