fn system_time_now() -> Time {
    UNIX_EPOCH
        + SystemTime::now()
            .duration_since(SystemTime::UNIX_EPOCH)
            .expect("SystemTime is before UNIX EPOCH!")
}
/// Return the current system time. Note that the value returned is not
/// guaranteed to be monotonic.
Return the current system time. Note that the value returned is not
guaranteed to be monotonic.
Return the current system time . Note that the value returned is not guaranteed to be monotonic .
fn system_time_now() -> Time {
    UNIX_EPOCH
        + SystemTime::now()
            .duration_since(SystemTime::UNIX_EPOCH)
            .expect("SystemTime is before UNIX EPOCH!")
}
fn system_time_now ( ) -> Time { UNIX_EPOCH + SystemTime :: now ( ) . duration_since ( SystemTime :: UNIX_EPOCH ) . expect ( " " ) }
Return the current system time.
Return the current system time .