∀ {C : Type u_1} [inst : CategoryTheory.Category.{v_1, u_1} C] [inst_1 : CategoryTheory.Preadditive C] {ι : Type u_2}
  {c : ComplexShape ι} {F G : HomologicalComplex C c} (φ : F ⟶ G) [inst_2 : HomologicalComplex.HasHomotopyCofiber φ]
  [inst_3 : DecidableRel c.Rel] (i j : ι) (hij : c.Rel i j)
  [inst_4 : CategoryTheory.Limits.HasBinaryBiproduct (F.X j) (G.X i)],
  HomologicalComplex.homotopyCofiber.XIsoBiprod φ i j hij = HomologicalComplex.homotopyCofiber.XIsoBiprod φ i j hij