code: def jsonify(self, obj, many=sentinel, *args, **kwargs):
          
          if many is sentinel:
              many = self.many
          if _MARSHMALLOW_VERSION_INFO[0] >= 3:
              data = self.dump(obj, many=many)
          else:
              data = self.dump(obj, many=many).data
          return flask.jsonify(data, *args, **kwargs)
docs: Return a JSON response containing the serialized data.
  
  
          :param obj: Object to serialize.
          :param bool many: Whether `obj` should be serialized as an instance
              or as a collection. If unset, defaults to the value of the
              `many` attribute on this Schema.
          :param kwargs: Additional keyword arguments passed to `flask.jsonify`.
  
          .. versionchanged:: 0.6.0
              Takes the same arguments as `marshmallow.Schema.dump`. Additional
              keyword arguments are passed to `flask.jsonify`.
  
          .. versionchanged:: 0.6.3
              The `many` argument for this method defaults to the value of
              the `many` attribute on the Schema. Previously, the `many`
              argument of this method defaulted to False, regardless of the
              value of `Schema.many`.