promotion abstract method

TRes promotion(
  1. Iterable<Input$PromotionProductsInput> _fn(
    1. Iterable<CopyWith$Input$PromotionProductsInput<Input$PromotionProductsInput>>
    )
)

Implementation

TRes promotion(
    Iterable<Input$PromotionProductsInput> Function(
            Iterable<
                CopyWith$Input$PromotionProductsInput<
                    Input$PromotionProductsInput>>)
        _fn);