Attribute CO_XT_JSON does not exist in IF_SXML

Hello Expert ,

I am calling RESTful service in SAP for POST method.I need convert ABAP data to JSON format .

In that i used IF_SXML=>CO_XT_JSON to convert but its giving error CO_XT_JSON is unknown .

And checked in other system its available there. Its look like  enhancement package issue . So please

suggest me how to add this attribute to this interface.

Thanks

Gaurav Sharma