You can search for identifiers within the package.
in-package search v0.2.0
val default_parse_toplevel_phrase : Stdlib.Lexing.lexbuf -> Parsetree.toplevel_phrase
val reason_parse_toplevel_phrase : Stdlib.Lexing.lexbuf -> Astlib.Ast_501.Parsetree.toplevel_phrase
val main : unit -> unit