[Serusers] t_was_cancelled() equivalent function for Ser?

[Ricardo Carvalho]

Hi,

I'm using Ser and I think I need to use the same functionality that the 
function t_was_cancelled() from openser does. As much as I know, this 
functions still doesn't exist in Ser. Is there any other that does the same?

(I need it to be able to skip sending a call to Asterisk voicemail every 
time that a call is hangup by the caller when it is still ringing on the 
callee. If  I don't such kind of function, if the caller hungs up when 
still ringing the callee UA, Ser sends the call to voicemail 
erroneously, which sends a voicemail e-mail to the ringed person)

Thanks,
Ricardo.