func math/rand.Int63n

2 uses

	math/rand (current package)
		rand.go#L327: func Int63n(n int64) int64 { return globalRand.Int63n(n) }

	github.com/googleapis/gax-go/v2
		call_option.go#L134: 	d := time.Duration(1 + rand.Int63n(int64(bo.cur)))