public static function take(ReservationId $reservationId, RestaurantId $restaurantId, CustomerId $customerId, $numPeople, \DateTime $dateTime)
 {
     $reservation = new Reservation();
     $reservation->recordThat(new ReservationWasTaken(['reservationId' => $reservationId, 'restaurantId' => $restaurantId, 'customerId' => $customerId, 'numPeople' => $numPeople, 'dateTime' => $dateTime]));
     return $reservation;
 }