Event SIP_CLIENT_MSG implemented?

Is event SIP_CLIENT_MSG implemented in 9.4.2 HF2 and 9.4.4 HF1? Can someone please update the wiki?

 

I need to do something as shown in below pseudo irule. SIP_REQUEST event is not sufficient for me since there are cases when external client will send SIP response to server through bigIP. What is my alternative here?

 

 

when SIP_CLIENT_MSG {

 

if { [sip::header Via] contain x.x.x.x }

 

node mynode

 

}

 

 

 

Thanks.