How to use identifier() about laravel-table HOT 1 CLOSED

public function index()
{
    $usersTable = (new \Okipa\LaravelTable\Table)
    ->model(\App\User::class)
    ->routes(['index' => ['name' => 'users.index']])
    ->identifier('Users table');
    $usersTable->column('name')->sortable()->searchable();

    $newsTable = (new \Okipa\LaravelTable\Table)
    ->model(\App\News::class)
    ->routes(['index' => ['name' => 'news.index']])
    ->identifier('News table');
    $newsTable->column('title')->sortable()->searchable();

    return view('your.view.path', compact('usersTable', 'newsTable'));
}