+ /**\r
+ * Indicates that the browser has a custom domain enabled. This has\r
+ * been set with "document.domain".\r
+ * @returns {Boolean} "true" if a custom domain is enabled.\r
+ * @example\r
+ * if ( CKEDITOR.env.isCustomDomain() )\r
+ * alert( "I'm in a custom domain!" );\r
+ */\r