code: def get_instance(self, payload):
          
          return WebhookInstance(
              self._version,
              payload,
              service_sid=self._solution['service_sid'],
              channel_sid=self._solution['channel_sid'],
          )
docs: Build an instance of WebhookInstance
  
          :param dict payload: Payload response from the API
  
          :returns: twilio.rest.chat.v2.service.channel.webhook.WebhookInstance
          :rtype: twilio.rest.chat.v2.service.channel.webhook.WebhookInstance