Lemma composeIdpathPathOver {X:Type} {x' x'':X} {p:x'=x''} {Y : X -> Type} {y': Y x'} {y'' : Y x''} (q : PathOver p y' y'') : idpath y' ⟤ q = q. Proof. reflexivity. Defined.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.PartA.