SRM UI Addon odata services are code based or designed using SEGW?

Hi Experts

Prior to SEGW the OData services were build following code based implementation following steps in the below mentioned links.

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/109c15ed-d8a3-2e10-7c9f-dcb1168aa1ff?QuickLink=index&overridelayout=true&53047141075265

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/50ad7227-68a9-2e10-b191-905cb9b6c31a?QuickLink=index&overridelayout=true&52175262718629

When I am trying to check for /SRMNXP/ services in SEGW tcode, I am not able to find them in F4 search.

Thanks in advance

Shivam Maurya