hospital_management-8.x-1.x-dev/web/modules/hms/hms_appointments/hms_appointments.routing.yml

hms_appointments.appointments_controller_addAppointment:
  path: '/appointment/add'
  defaults:
    _controller: '\Drupal\hms_appointments\Controller\AppointmentsController::addAppointment'
    _title: 'addAppointment'
  requirements:
    _permission: 'access content'