val to_string : t -> string
val of_string : string -> t option
val to_assoc_list : t -> (string * string) list
val of_assoc_list : (string * string) list -> (t, string) Stdlib.result
Conproto.State
val to_string : t -> string
val of_string : string -> t option
val to_assoc_list : t -> (string * string) list
val of_assoc_list : (string * string) list -> (t, string) Stdlib.result