∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] [inst_1 : CategoryTheory.Abelian C] {X : C}
  (I J : CategoryTheory.InjectiveResolution X) {Z : CochainComplex C ℕ} (h : I.cocomplex ⟶ Z),
  CategoryTheory.CategoryStruct.comp J.ι (CategoryTheory.CategoryStruct.comp (I.homotopyEquiv J).inv h) =
    CategoryTheory.CategoryStruct.comp I.ι h