method previous : 'a (** @raise History_failure *)
method load: 'a memento -> unit
method save: 'a memento
+ method is_begin: bool
+ method is_end: bool
end
(** shell like history: new items added at the end of the history
val get_proof_status: MatitaTypes.status -> ProofEngineTypes.status
val get_proof_metasenv: MatitaTypes.status -> Cic.metasenv
val get_proof_context: MatitaTypes.status -> Cic.context
+val get_proof_aliases: MatitaTypes.status -> DisambiguateTypes.environment