val get_active_notations: unit -> notation_id list
val set_active_notations: notation_id list -> unit
+(* resets internal couenters. this is an hack used in matitaScript.
+ * if you are in the middle of a script (with an history you may use to undo
+ * with some notations id inside) and you want to compile an external file
+ * in an empty environment you need, after its compilation, to restore
+ * the previous environment (re-executing all notations commands) and this must
+ * produce the same ids as before, otherwise history is wrong. *)
+ val reset: unit -> unit