∀ {β : Type u_1} [inst : AddCommGroup β] {b : β} {V : Type u_2} [inst_1 : CategoryTheory.Category.{v_1, u_2} V]
  [inst_2 : CategoryTheory.Limits.HasZeroMorphisms V]
  (X : CategoryTheory.DifferentialObject ℤ (CategoryTheory.GradedObjectWithShift b V)) (i : β),
  X.objEqToHom ⋯ = CategoryTheory.CategoryStruct.id (X.obj i)