You can search for identifiers within the package.
in-package search v0.2.0
type token =
| STRING of string
| SLASH_STRING of string
| TRUE
| FALSE
| EQUAL
| NOT_EQUAL
| MATCHES
| NOT_MATCHES
| LPAR
| RPAR
| NOT
| OR
| AND
| EOF
val expression : (Stdlib.Lexing.lexbuf -> token) -> Stdlib.Lexing.lexbuf -> TSL_AST.t