fact: Definition issig_NatTrans {A B : Type} `{IsGraph A} `{Is1Cat B} (F G : A -> B) {ff : Is0Functor F} {fg : Is0Functor G} : _ <~> NatTrans F G := ltac:(issig).
imports: Basics.Overture Basics.Tactics WildCat.Core WildCat.Equiv WildCat.Square