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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
// classes must be concept classes
svoid ensureConceptClassesAreIndexed(Concepts cc default db_mainConcepts(), Cl<Class> classes) {
  fOr (Class c : classes)
    ensureConceptClassIsIndexed(cc, c);
}

svoid ensureConceptClassesAreIndexed(Concepts cc default db_mainConcepts(), Class... classes) {
  ensureConceptClassesAreIndexed(cc, asList(classes));
}