You can search for identifiers within the package.
in-package search v0.2.0
type token =
| UPPER_IDENT of string
| TYPE
| RPAREN
| MODULE
| LPAREN
| LOWER_IDENT of string
| EOF
| DOT
| COMMA
| AS
exception Error
val open_payload : (Lexing.lexbuf -> token) -> Lexing.lexbuf -> Parsed.Payload.t