∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] [inst_1 : CategoryTheory.Abelian C] (K L : CochainComplex C ℤ)
  (n : ℤ)
  [inst_2 :
    CategoryTheory.Localization.HasSmallLocalizedShiftedHom (HomologicalComplex.quasiIso C (ComplexShape.up ℤ)) ℤ K L]
  [L.IsKInjective], Function.Bijective CochainComplex.HomComplex.CohomologyClass.toSmallShiftedHom