5 pub struct Instant(Duration);  struct
7 impl Ord for Instant {  implementation
13 impl Eq for Instant {}  implementation
15 impl Instant {  implementation
39     pub fn checked_add(&self, duration: Duration) -> Option<Instant> {  in checked_add()
47     pub fn checked_sub(&self, duration: Duration) -> Option<Instant> {  in checked_sub()
52 impl Add<Duration> for Instant {  implementation
61 impl AddAssign<Duration> for Instant {  implementation
68 impl Sub<Duration> for Instant {  implementation
77 impl Sub<Instant> for Instant {  implementation
86 impl SubAssign<Duration> for Instant {  implementation