please include function conceptsAndBot.
please include function dbBot.

static void dbOff() {
  lock dbLock();
  if (!conceptsAndBot_running) ret;
  conceptsAndBot_running = false;
  if (dbBot_instance != null) {
    dbBot_instance.dispose();
    dbBot_instance = null;
  }
  cleanMeUp_concepts();
  mainConcepts.clearConcepts();
}