code: def send_message(
              self,
              title=None,
              body=None,
              icon=None,
              data=None,
              sound=None,
              badge=None,
              api_key=None,
              **kwargs):
          
          from .fcm import fcm_send_message
          result = fcm_send_message(
              registration_id=str(self.registration_id),
              title=title,
              body=body,
              icon=icon,
              data=data,
              sound=sound,
              badge=badge,
              api_key=api_key,
              **kwargs
          )
  
          self._deactivate_device_on_error_result(result)
          return result
docs: Send single notification message.