pictures abstract method

TRes pictures(
  1. Iterable<Query$challenge$challenge$donation$donation$media$pictures>? _fn(
    1. Iterable<CopyWith$Query$challenge$challenge$donation$donation$media$pictures<Query$challenge$challenge$donation$donation$media$pictures>>?
    )
)

Implementation

TRes pictures(
    Iterable<Query$challenge$challenge$donation$donation$media$pictures>? Function(
            Iterable<
                CopyWith$Query$challenge$challenge$donation$donation$media$pictures<
                    Query$challenge$challenge$donation$donation$media$pictures>>?)
        _fn);