You can search for identifiers within the package.
in-package search v0.2.0
type value = Yojson.Basic.json
type 'a encoder = 'a -> value
val string : string encoder
val int : int encoder
val float : float encoder
val bool : bool encoder
val null : value
val option : 'a encoder -> 'a option encoder
val list : 'a encoder -> 'a list encoder
val obj : (string * value) list encoder
val obj' : (value * value) list encoder
val value : value encoder
val encode_value : 'a encoder -> 'a -> value
val encode_string : 'a encoder -> 'a -> string