{A B : Type} `{In O B} (f : A -> B) `{O_inverts f} : O A <~> B := Build_Equiv _ _ _ (isequiv_O_rec_O_inverts f).
Require Import HoTT.Basics HoTT.Types. Require Import Equiv.BiInv Extensions HProp HFiber NullHomotopy Limits.Pullback. Require Import Homotopy.IdentitySystems. Require Import Colimits.Pushout.