public void loadLibraries() {

    for (LoadLibraryEventListener listener : loadLibraryEventListeners) {
      // only import if it is never created before.
      if (!Namespace.isNamespaceCreated(rootNamespace, "ROOT." + listener.getNamespaceFullName())) {
        listener.addLibrary(rootNamespace, scopeService, assetService);
      }
    }
  }