What is the output_type in the metric for?

[dennisrall]

Every metric has an output_type. I can't find the place where it is accessed.

@register_metric(
    metric="acc",
    higher_is_better=True,
    output_type=["loglikelihood", "multiple_choice"],
    aggregation="mean",
)

The register metric decorator does not access this from the args.

def register_metric(**args):
    # TODO: do we want to enforce a certain interface to registered metrics?
    def decorate(fn):
        assert "metric" in args
        name = args["metric"]

        for key, registry in [
            ("metric", METRIC_REGISTRY),
            ("higher_is_better", HIGHER_IS_BETTER_REGISTRY),
            ("aggregation", METRIC_AGGREGATION_REGISTRY),
        ]:
            if key in args:
                value = args[key]
                assert (
                    value not in registry
                ), f"{key} named '{value}' conflicts with existing registered {key}!"

                if key == "metric":
                    registry[name] = fn
                elif key == "aggregation":
                    registry[name] = AGGREGATION_REGISTRY[value]
                else:
                    registry[name] = value

        return fn

    return decorate