fact: Definition composePathOverIdpath {X:Type} {x x':X} {p:x=x'} {Y : X -> Type} {y : Y x} {y': Y x'} (q : PathOver p y y') : q ⟥ idpath y' = q.
imports: UniMath.Foundations.All UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.PartA