private void callCallback(final SelectAction action, final Object parameter) {
        final Consumer<Object> callback = this.selectActionCallbacks.get(action);
        if (callback != null) {
            callback.accept(parameter);
        }
    }
returns for a folder internationalized strings for file count (left), dir count (middle) and total file size (right)
main/src/main/java/cgeo/geocaching/storage/ContentStorageActivityHelper.java