def list_webhooks(self, scaling_group, policy):
        """
        Returns a list of all webhooks for the specified policy.
        """
        uri = "/%s/%s/policies/%s/webhooks" % (self.uri_base,
                utils.get_id(scaling_group), utils.get_id(policy))
        resp, resp_body = self.api.method_get(uri)
        return [AutoScaleWebhook(self, data, policy, scaling_group)
                for data in resp_body.get("webhooks", [])]
Returns a list of all webhooks for the specified policy.