code: public static IWicketJquerySelectorsSettings settings() {
          if (Application.exists()) {
              final IWicketJquerySelectorsSettings settings = Application.get().getMetaData(JQUERY_SELECTORS_SETTINGS_METADATA_KEY);
  
              if (settings != null) {
                  return settings;
              } else {
                  throw new IllegalStateException("you have to call WicketJquerySelectors.install()");
              }
          }
  
          throw new IllegalStateException("there is no active application assigned to this thread.");
      }
docs: returns the {@link IWicketJquerySelectorsSettings} which are assigned to current application
  
  @return assigned {@link IWicketJquerySelectorsSettings}