deg360 abstract method

TRes deg360(
  1. Iterable<Query$challenge$challenge$winners$reward$media$deg360>? _fn(
    1. Iterable<CopyWith$Query$challenge$challenge$winners$reward$media$deg360<Query$challenge$challenge$winners$reward$media$deg360>>?
    )
)

Implementation

TRes deg360(
    Iterable<Query$challenge$challenge$winners$reward$media$deg360>? Function(
            Iterable<
                CopyWith$Query$challenge$challenge$winners$reward$media$deg360<
                    Query$challenge$challenge$winners$reward$media$deg360>>?)
        _fn);