cara menambahkan atribut ke objek permintaan di Laravel

//this is my code

this how to add single attribute to the request object in laravel:-
  
$request->request->add(['car' => 'value']); 

this is how to add multiple attributes to the request object in laravel:-
$request->request->add(['car' => 'value',  'end' => 'done']); 
Wide-eyed Wryneck