callMessage.answer().map(Answer::from).orElse(null),
callMessage.busy().map(Busy::from).orElse(null),
callMessage.hangup().map(Hangup::from).orElse(null),
callMessage.answer().map(Answer::from).orElse(null),
callMessage.busy().map(Busy::from).orElse(null),
callMessage.hangup().map(Hangup::from).orElse(null),