pr1_obj o sig_functor_obj = pr1' := idpath.
Require Import HoTT.Basics HoTT.Types. Require Import Category.Core Functor.Core Category.Sigma.Core. Require Import Functor.Paths. Import Functor.Identity.FunctorIdentityNotations. Import Functor.Composition.Core.FunctorCompositionCoreNotations.