// #[derive(Debug)]
// enum VRRPv2State {
//     Initialize,
//     Backup,
//     Master,
// }

// struct StateMachine {
//     state: VRRPv2State,
// }

// impl StateMachine {
//     fn new() -> Self {
//         StateMachine {
//             state: VRRPv2State::Initialize,
//         }
//     }
//     fn transit_to(&mut self, new_state: VRRPv2State) {
//         std::println!("vvrpd: {:?} -> {:?}", self.state, new_state);
//         self.state = new_state;
//     }
// }

fn main() {
    // let mut sm = StateMachine::new();
    // sm.transit_to(VRRPv2State::Master);
    // sm.transit_to(VRRPv2State::Backup);
}