∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.Preadditive C]
  [CategoryTheory.Limits.HasBinaryBiproducts C] {K L : CochainComplex C ℤ} (φ : K ⟶ L) (n : ℤ),
  HomologicalComplex.HasHomotopyCofiber ((CategoryTheory.shiftFunctor (CochainComplex C ℤ) n).map φ)