You can search for identifiers within the package.
in-package search v0.2.0
ppxlib.stdppx
Stdppx.In_channel
val create : ?binary:bool -> string -> Caml.in_channel
val with_file : ?binary:bool -> string -> f:(Caml.in_channel -> 'a) -> 'a
val input_all : Caml.in_channel -> string
val read_all : string -> string