// assumes main concepts are empty before

// only works when you call db() afterwards

svoid quickImportMainConcepts(virtual Concepts oldConcepts, IF0<Bool> enabled default null) {

  if (!shortNameIs(oldConcepts, "Concepts")) ret;

  Concepts concepts = db_mainConcepts();

  concepts.miscMapPut("dbGrabber", func -> Bool {

    concepts.miscMapRemove("dbGrabber");

    pcall {

      if (isFalse(callF(enabled))) false;

      concepts.idCounter = getLong idCounter(oldConcepts);

      printVars_str(idCounter := concepts.idCounter);

      Map<Long, virtual Concept> oldMap = cast _get concepts(oldConcepts);

      printVars_str(+oldMap);

      new RealmCopy rc;

      rc.nonTransientOnly = true;

      rc.fullCopy = true;

      rc.overrideCollectionOrMapCopy = o -> {

        rc.classMap.put(_getClass(o), _getClass(o));

        false;

      };

      {

        temp tempSetTL(dynamicObjectIsLoading_threadLocal(), true);

        concepts.concepts.putAll((Map<Long, Concept>) rc.copy(oldMap));

      }

      pnl("quickImportDB", mapSortedByFunctionOnKey str(rc.classMap));

      // Note: this calls _doneLoading2() on all concepts

      concepts.assignConceptsToUs();

      print(nConcepts(countConcepts()) + " quick-imported");

      true;

    }

    false;

  });

}