{C : Type u_1} →
  [inst : CategoryTheory.Category.{v_1, u_1} C] →
    [inst_1 : CategoryTheory.Preadditive C] →
      [inst_2 : CategoryTheory.Limits.HasBinaryBiproducts C] →
        (K : CochainComplex C ℤ) →
          Homotopy (CategoryTheory.CategoryStruct.id (CochainComplex.mappingCone (CategoryTheory.CategoryStruct.id K)))
            0