def _load(self):
        """
        Function load.
        :return: Response content
        :raises: NotFoundError
        """
        try:
            get = requests.get(self._ref,
                               verify=self.http_verify,
                               auth=self.auth,
                               timeout=self.timeout)
        except requests.exceptions.RequestException as err:
            raise NotFoundError(err)
        return get.content
Function load.
        :return: Response content
        :raises: NotFoundError