code: def send_message(registration_ids, data, cloud_type, application_id=None, **kwargs):
  	
  	if cloud_type in ("FCM", "GCM"):
  		max_recipients = get_manager().get_max_recipients(cloud_type, application_id)
  	else:
  		raise ImproperlyConfigured("cloud_type must be FCM or GCM not %s" % str(cloud_type))
  
  	# Checks for valid recipient
  	if registration_ids is None and "/topics/" not in kwargs.get("to", ""):
  		return
  
  	# Bundles the registration_ids in an list if only one is sent
  	if not isinstance(registration_ids, list):
  		registration_ids = [registration_ids] if registration_ids else None
  
  	# FCM only allows up to 1000 reg ids per bulk message
  	# https://firebase.google.com/docs/cloud-messaging/server#http-request
  	if registration_ids:
  		ret = []
  		for chunk in _chunks(registration_ids, max_recipients):
  			ret.append(_cm_send_request(
  				chunk, data, cloud_type=cloud_type, application_id=application_id, **kwargs
  			))
  		return ret[0] if len(ret) == 1 else ret
  	else:
  		return _cm_send_request(None, data, cloud_type=cloud_type, **kwargs)
docs: Sends a FCM (or GCM) notification to one or more registration_ids. The registration_ids
  	can be a list or a single string. This will send the notification as json data.
  
  	A reference of extra keyword arguments sent to the server is available here:
  	https://firebase.google.com/docs/cloud-messaging/http-server-ref#table1