You can search for identifiers within the package.
in-package search v0.2.0
type dest =
| File of out_channel
| Buffer of Buffer.t
type t
val appendToBuff : dest -> string -> unit
val newBuffer : unit -> t
val newFile : string -> t
val contents : t -> string
val close : t -> unit
val newline : t -> unit
val indent : t -> unit
val outdent : t -> unit
val append : t -> string -> unit