fact: Definition equiv_ooextendable_pathsplit `{Funext} {A B : Type} (C : B -> Type) (f : A -> B) : ooExtendableAlong f C <~> ooPathSplit (fun (g : forall b, C b) => g oD f).
imports: HoTT.Basics HoTT.Types Equiv.PathSplit PathAny Cubical.DPath Cubical.DPathSquare Colimits.Coeq Colimits.MappingCylinder