You can search for identifiers within the package.
in-package search v0.2.0
testo-util
Testo_util.Tag_query_parser
type token =
| TAG of Tag.t
| AND
| OR
| NOT
| ALL
| NONE
| LPAREN
| RPAREN
| EOF
val main : (Lexing.lexbuf -> token) -> Lexing.lexbuf -> Tag.query