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/// Connection mode, indicate is keep alive or not.
pub trait Mode {
    fn is_keep_alive() -> bool;
}

/// Short connection mode.
pub struct ShortConn;

impl Mode for ShortConn {
    fn is_keep_alive() -> bool {
        false
    }
}

/// Keep alive connection mode.
pub struct KeepAlive {}

impl Mode for KeepAlive {
    fn is_keep_alive() -> bool {
        true
    }
}