code: @SuppressWarnings({"WeakerAccess", "unused"}) // For library users
      public void enableProgressBar() {
          showProgressBar = true;
  
          if (searchBoxViewModel != null) {
              progressController = new SearchProgressController(new SearchProgressController.ProgressListener() {
                  @Override
                  public void onStart() {
                      updateProgressBar(searchBoxViewModel, true);
                  }
  
                  @Override
                  public void onStop() {
                      updateProgressBar(searchBoxViewModel, false);
                  }
              }, progressBarDelay);
          }
      }
docs: Enables the display of a spinning {@link android.widget.ProgressBar ProgressBar} in the SearchView when waiting for results.