val fv : t -> Mlsem_types__.Tvar.MVarSet.tval substitute : Mlsem_types__.Tvar.Subst.t -> t -> tval opl : (Ty.t list -> bool) -> (Ty.t list -> Ty.t) -> t list -> t optionval equiv : t -> t -> boolval non_gradual : t -> boolval pp : Stdlib.Format.formatter -> t -> unitval pp' : Mlsem_types__.Tvar.Subst.t -> Stdlib.Format.formatter -> t -> unit