You can search for identifiers within the package.
in-package search v0.2.0
val char : t -> char -> unit
val string : t -> ?pos:int -> ?len:int -> string -> unit
val bytes : t -> ?pos:int -> ?len:int -> bytes -> unit
val bigstring : t -> ?pos:int -> ?len:int -> Core.Bigstring.t -> unit
val bytebuffer : t -> t -> unit