def METHOD_NAME(
    self,
    server_round: int,
    results: List[Tuple[ClientProxy, EvaluateRes]],
    failures: List[Union[Tuple[ClientProxy, EvaluateRes], BaseException]],
) -> Tuple[Optional[float], Dict[str, Scalar]]:
    """Aggregate evaluation losses using the given strategy."""
    return self.strategy.METHOD_NAME(server_round, results, failures)