public function shopWebhooks()
    {
        if (!$this->shopWebhooks) {
            $this->shopWebhooks = $this->api->rest(
                'GET',
                '/admin/webhooks.json',
                [
                    'limit'  => 250,
                    'fields' => 'id,address',
                ]
            )->body->webhooks;
        }

        return $this->shopWebhooks;
    }