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static volatile Concepts mainConcepts; // Where we create new concepts

static Concepts db_mainConcepts() {
  if (mainConcepts == null)
    mainConcepts = newConceptsWithClassFinder(getDBProgramID());
  ret mainConcepts;
}

static void cleanMeUp_concepts() {
  if (db_mainConcepts() != null) db_mainConcepts().cleanMeUp();
  // mainConcepts = null; // TODO
}