val tm_unwrap : Unix.tm -> float
val validate_mbid :
  Listenbrainz_t.mbid -> bool
val validate_isrc :
  Listenbrainz_t.isrc -> bool
val validate_post_submit_listens :
  Listenbrainz_t.post_submit_listens -> bool
val validate_get_validate_token :
  Listenbrainz_t.get_validate_token -> bool
val validate_get_user_playing_now :
  Listenbrainz_t.get_user_playing_now -> bool
val validate_get_user_listens :
  Listenbrainz_t.get_user_listens -> bool