public function __invoke(RegisterWalkIn $registerWalkIn)
 {
     $patient = Patient::walkIn(PersonalInformation::fromDetails(FullName::fromParts($registerWalkIn->firstName, $registerWalkIn->lastName), BirthDate::fromYearMonthDayFormat($registerWalkIn->dateOfBirth), new Sex($registerWalkIn->sex), $registerWalkIn->patientId), $registerWalkIn->indication, $registerWalkIn->patientId);
     $this->patientRepository->add($patient);
 }