public static function make($id, $num, Card_content $card_content, $is_deleted)
{
$retour = new self();
$retour->id = $id;
$retour->num = $num;
$retour->card_content = $card_content;
$card_content->set_card($retour);
$retour->is_deleted = $is_deleted;
return $retour;
}
