interface G22MasterStuff {
  RunnablesReferenceQueue runnablesReferenceQueue();
  EphemeralObjectIDs ephemeralObjectIDs();
  
  File databasesMotherDir();
  IG22LoadedDB openDatabase(File dir, bool hidden default false);
  void closeDatabase(File dir);
  void switchToDatabase(File dir);
  Cl<File> openConceptDirs();
  IG22LoadedDB getLoadedDB(Concepts concepts);
  IG22LoadedDB getLoadedDBForConceptDir(File dir);
  Cl<? extends IG22LoadedDB> getLoadedDBs();
  G22MasterStuff onLoadedDBsChange(Runnable r);
  G22MasterStuff removeLoadedDBsChangeListener(Runnable r);
  IF1<S, Class> makeClassFinder();
  IGetterWithNotify<Int> lvGazelleUserCount();
  ILASClassLoader lasClassLoader();
  
  default bool isConceptDirLoaded(File dir) {
    ret getLoadedDBForConceptDir(dir) != null;
  }
}