// We will attempt the function call 3 times
// with an initial waiting time of 3 seconds.
retryOptions := retry.Options{
	Attempts:                  3,
	InitialTimeBetweenRetries: 3,
}

value, err = retry.Func(retryOptions, func() (interface{}, error) {
	return someservice.GetSomeValue()
})

// [err] will be non nil if the function didn't succeed after
// the maximum number of attempts has been reached.
if err != nil {
  panic(err)
}

fmt.Println(value)