1 -- explicitly use nanoseconds --
10 time.Sleep(1 * time.Nanosecond) // want `sleeping for 1`
11 time.Sleep(42 * time.Nanosecond) // want `sleeping for 42`
15 time.Sleep(2 * time.Nanosecond)
16 time.Sleep(time.Nanosecond)
28 time.Sleep(1 * time.Second) // want `sleeping for 1`
29 time.Sleep(42 * time.Second) // want `sleeping for 42`
33 time.Sleep(2 * time.Nanosecond)
34 time.Sleep(time.Nanosecond)