Laravel Datatables, return only specific rows

I am using Yajra\Datatables\Services\DataTable

I have a controller with:

use App\DataTables\restaurantsDataTable;

class restaurantsController extends AppBaseController {

public function index(restaurantsDataTable $restaurantsDataTable)
{
    return $restaurantsDataTable->render('restaurants.index');
}

....

}

and the App\DataTables\restaurantsDataTable with:

use App\Models\restaurants; use Form; use Yajra\Datatables\Services\DataTable;

class restaurantsDataTable extends DataTable {

/**
 * @return \Illuminate\Http\JsonResponse
 */
public function ajax()
{
    return $this->datatables
        ->eloquent($this->query())
        ->addColumn('action', 'restaurants.datatables_actions')
        ->make(true);
}

/**
 * Get the query object to be processed by datatables.
 *
 * @return \Illuminate\Database\Query\Builder|\Illuminate\Database\Eloquent\Builder
 */
public function query()
{
    $restaurants = restaurants::query();

    return $this->applyScopes($restaurants);
}

/**
 * Optional method if you want to use html builder.
 *
 * @return \Yajra\Datatables\Html\Builder
 */
public function html()
{
    return $this->builder()
        ->columns($this->getColumns())
        ->addAction(['width' => '10%'])
        ->ajax('')
        ->parameters([
            'dom' => 'Bfrtip',
            'scrollX' => false,
            'buttons' => [
                'print',
                'reset',
                'reload',
                [
                     'extend'  => 'collection',
                     'text'    => '<i class="fa fa-download"></i> Export',
                     'buttons' => [
                         'csv',
                         'excel',
                         'pdf',
                     ],
                ],
                'colvis'
            ]
        ]);
}

/**
 * Get columns.
 *
 * @return array
 */
private function getColumns()
{
    return [
        'res_name' => ['name' => 'res_name', 'data' => 'res_name'],
        'res_image' => ['name' => 'res_image', 'data' => 'res_image', 'visible' => false],
        'res_image_date' => ['name' => 'res_image_date', 'data' => 'res_image_date', 'visible' => false],
        'res_address' => ['name' => 'res_address', 'data' => 'res_address'],
        'res_state' => ['name' => 'res_state', 'data' => 'res_state'],
        'res_location' => ['name' => 'res_location', 'data' => 'res_location'],
        'res_area' => ['name' => 'res_area', 'data' => 'res_area'],
        'res_telephone' => ['name' => 'res_telephone', 'data' => 'res_telephone', 'visible' => false],
        'res_min_price' => ['name' => 'res_min_price', 'data' => 'res_min_price', 'visible' => false],
        'res_max_price' => ['name' => 'res_max_price', 'data' => 'res_max_price', 'visible' => false],
        'res_latitude' => ['name' => 'res_latitude', 'data' => 'res_latitude', 'visible' => false],
        'res_longitude' => ['name' => 'res_longitude', 'data' => 'res_longitude', 'visible' => false],
        'res_chain' => ['name' => 'res_chain', 'data' => 'res_chain', 'visible' => false],
        'res_new' => ['name' => 'res_new', 'data' => 'res_new', 'visible' => false],
        'res_offer' => ['name' => 'res_offer', 'data' => 'res_offer', 'visible' => false],
        'res_type_state' => ['name' => 'res_type_state', 'data' => 'res_type_state', 'visible' => false]
    ];
}

/**
 * Get filename for export.
 *
 * @return string
 */
protected function filename()
{
    return 'restaurants';
}

}

How do I customize the:

public function index(restaurantsDataTable $restaurantsDataTable) { return $restaurantsDataTable->render('restaurants.index'); }

to return some table rows that matched some ids? like:

App\Models\restaurants::where('res_id', '=', 1)->get();