proposition: Lemma isaprop_is_univalent_folds_2_precat (C : folds_pre_2_cat) : isaprop (is_univalent_folds_pre_2_cat C).
proof: Proof. do 4 (apply impred; intro); apply isapropisweq. Qed.
imports: UniMath.Folds.UnicodeNotations UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets