Enable keepalive

[<alexinessweetoptions@xxxxxxxxx>]

hi,

i found the following codes in https://www.resiprocate.org/DUM_Keep_Alive_Manager.

"To enable keep alive messages you need to call:"

auto_prt<KeepAliveManager> keepAlive(new KeepAliveManager);
 dum->setKeepAliveManager(keepAlive); 
 dum->getMasterProfile()->setKeepAliveTimeForDatagram(30);
 dum->getMasterProfile()->setKeepAliveTimeForStream(30);

I want to enable the keepalive,  where do i have to put the above codes?

thank you in advance..