Verifies the parameters don't use any reserved parameter.

        Raises:
            ValueError: If a reserved parameter is used.

def _verify_params(self):
        """Verifies the parameters don't use any reserved parameter.

        Raises:
            ValueError: If a reserved parameter is used.
        """
        reserved_in_use = self._RESERVED_PARAMS.intersection(self.extra_params)
        if reserved_in_use:
            raise ValueError("Using a reserved parameter", reserved_in_use)