Functor category C := Build_Functor category C c (fun s d => @ _ _) (fun _ _ _ _ _ => idpath) (fun _ => idpath).
Require Import FunctorCategory.Morphisms. Require Import Category.Core Functor.Core NaturalTransformation.Core. Require Import Pseudofunctor.Core Pseudofunctor.RewriteLaws. Require Import Category.Morphisms Cat.Morphisms. Require Import Functor.Composition.Core. Require Import Functor.Identity. Require Import FunctorCategory.Core. Require Import Basics Types HoTT.Tactics.