old_contents: from django.urls import re_path
  from vehicles import consumers
  
  
  websocket_urlpatterns = [
      re_path(r'^ws/vehicle_positions$', consumers.VehicleMapConsumer),
      re_path(r'^ws/vehicle_positions/services/(?P<service_ids>[\d,]+)$', consumers.ServiceMapConsumer),
  ]
  
new_contents: from django.urls import re_path
  from vehicles import consumers
  
  
  websocket_urlpatterns = [
      re_path(r'^ws/vehicle_positions$', consumers.VehicleMapConsumer.as_asgi()),
      re_path(r'^ws/vehicle_positions/services/(?P<service_ids>[\d,]+)$', consumers.ServiceMapConsumer.as_asgi()),
  ]
  
subject: support Django Channels 3.0