`{Funext} (O : ReflectiveSubuniverse) (P Q : Type) `{In O Q} : (O P -> Q) <~> (P -> Q) := Build_Equiv _ _ (fun g : O P -> Q => g o to O P) _.
Require Import HoTT.Basics HoTT.Types. Require Import Equiv.BiInv Extensions HProp HFiber NullHomotopy Limits.Pullback. Require Import Homotopy.IdentitySystems. Require Import Colimits.Pushout.