∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {A B : C} {f g : A ⟶ B}
  [inst_1 : CategoryTheory.IsReflexivePair f g] [h : CategoryTheory.Limits.HasCoequalizer f g],
  CategoryTheory.CategoryStruct.comp
      (CategoryTheory.Limits.colimit.ι (CategoryTheory.Limits.ofIsReflexivePair f g)
        CategoryTheory.Limits.WalkingReflexivePair.zero)
      CategoryTheory.Limits.colimitOfIsReflexivePairIsoCoequalizer.hom =
    CategoryTheory.Limits.coequalizer.π f g