Restoring config flags

Author: sol-loup

app/code/Meta/BusinessExtension/Model/System/Config.php

@@ -36,6 +36,8 @@
  */
 class Config
 {
+    public const META_PRODUCT_SET_ID = 'meta_product_set_id';
+    public const CATEGORY_SYNC_TO_FACEBOOK = 'sync_to_facebook_catalog';
     private const VERSION_CACHE_KEY = 'meta-business-extension-version';
     private const EXTENSION_PACKAGE_NAME = 'meta/meta-for-magento2';
 
@@ -75,6 +77,8 @@ class Config
     public const XML_PATH_FACEBOOK_BUSINESS_EXTENSION_ACCESS_TOKEN = 'facebook/business_extension/access_token';
     public const XML_PATH_FACEBOOK_BUSINESS_EXTENSION_CLIENT_ACCESS_TOKEN =
         'facebook/business_extension/client_access_token';
+    public const XML_PATH_FACEBOOK_BUSINESS_EXTENSION_PAGE_ACCESS_TOKEN =
+        'facebook/business_extension/page_access_token';
     private const XML_PATH_FACEBOOK_BUSINESS_EXTENSION_OUT_OF_STOCK_THRESHOLD =
         'facebook/catalog_management/out_of_stock_threshold';