fact: Definition retractof_hfiber {X Y : Type} (R : RetractOf X) (f : X -> Y) (g : retract_type R -> Y) (p : g o retract_retr R == f) (y : Y) : RetractOf (hfiber f y).
imports: HoTT.Basics HoTT.Types HFiber Constant Truncations.Core Modalities.Modality PathAny