fact: Definition composePathPathOver {X:Type} {x' x'':X} {p:x'=x''} {Y : X -> Type} {y y': Y x'} {y'' : Y x''} : y = y' → PathOver p y' y'' → PathOver p y y''.
imports: UniMath.Foundations.All UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.PartA