code: public function createWebhooks()
      {
          $configWebhooks = $this->configWebhooks();
  
          // Create if it does not exist
          $created = [];
          foreach ($configWebhooks as $webhook) {
              // Check if the required webhook exists on the shop
              if (!$this->webhookExists($webhook)) {
                  // It does not... create the webhook
                  $this->api->rest('POST', '/admin/webhooks.json', ['webhook' => $webhook]);
                  $created[] = $webhook;
              }
          }
  
          return $created;
      }
docs: Creates webhooks (if they do not exist).
  
  @return array