docs: function(fetchOptions = {}, options) {
          var self = this;
          var request = _request(
            'classes',
            this.className,
            this.id,
            'GET',
            transformFetchOptions(fetchOptions),
            options
          );
          return request.then(function(response) {
            const fetchedAttrs = self.parse(response);
            if (!fetchOptions.keys) self._cleanupUnsetKeys(fetchedAttrs);
            self._finishFetch(fetchedAttrs, true);
            return self;
          });
        }