You can search for identifiers within the package.
in-package search v0.2.0
type token =
| IndexOne of int
| IndexMany of int * int
| ADD
| DELETE
| CHANGE
| SEP
| EOF
| AddedString of string
| DeletedString of string
| NO_FINAL_NL
val main : (Lexing.lexbuf -> token) -> Lexing.lexbuf -> Odiff_types.diffs