-val empty_context: context
-
-val push: (context -> 'a) -> context -> Brg.bind -> Brg.term -> 'a
-
-val get: (Brg.bind * Brg.term -> 'a) -> context -> int -> 'a
-
-val are_convertible: (bool -> 'a) -> context -> Brg.term -> Brg.term -> 'a
-
-val ho_whd: (context -> ho_whd_result -> 'a) -> context -> Brg.term -> 'a