∀ {C : Type u_1} [inst : CategoryTheory.Category.{v_1, u_1} C] [inst_1 : CategoryTheory.Preadditive C]
  [inst_2 : CategoryTheory.MonoidalCategory C] [inst_3 : CategoryTheory.MonoidalPreadditive C]
  [inst_4 : CategoryTheory.Limits.HasFiniteBiproducts C] {J : Type} [inst_5 : Finite J] (X : C) (f : J → C) (j : J)
  {Z : C} (h : (⨁ fun j => CategoryTheory.MonoidalCategoryStruct.tensorObj X (f j)) ⟶ Z),
  CategoryTheory.CategoryStruct.comp
      (CategoryTheory.MonoidalCategoryStruct.whiskerLeft X (CategoryTheory.Limits.biproduct.ι f j))
      (CategoryTheory.CategoryStruct.comp (CategoryTheory.leftDistributor X f).hom h) =
    CategoryTheory.CategoryStruct.comp
      (CategoryTheory.Limits.biproduct.ι (fun j => CategoryTheory.MonoidalCategoryStruct.tensorObj X (f j)) j) h