∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.Preadditive C] (X₁ X₂ : C)
  [inst_2 : CategoryTheory.Limits.HasBinaryBiproduct X₁ X₂],
  CategoryTheory.CategoryStruct.comp CategoryTheory.Limits.biprod.inl CategoryTheory.Limits.biprod.snd = 0