def METHOD_NAME(
    self, node: Node, visited_children: Iterable[Any]
) -> AggregateFunction[MigrationModifiers]:
    (
        _agg,
        _paren,
        _sp,
        agg_func,
        _sp,
        _comma,
        _sp,
        agg_types,
        _sp,
        _paren,
    ) = visited_children
    return AggregateFunction(agg_func, [*agg_types])