proposition: Lemma id_identity2 {C : folds_precat} {a : C} {f : a ⇒ a} : f = identity (C:=C^^) _ -> I f.
proof: Proof. intro H; rewrite H. apply I_func_I. Qed.
imports: UniMath.Folds.UnicodeNotations UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.Foundations.UnivalenceAxiom UniMath.CategoryTheory.Core.Categories UniMath.Folds.folds_precat