module Json_string: sig .. end
sig
end
type t = string
string
val of_yojson : [> `String of 'a ] -> ('a, string) Stdlib.result
[> `String of 'a ] -> ('a, string) Stdlib.result
val to_yojson : 'a -> [> `String of 'a ]
'a -> [> `String of 'a ]