clientv3/retry_interceptor.go
func withRetryPolicy(rp retryPolicy) retryOption {
	return retryOption{applyFunc: func(o *options) {
		o.retryPolicy = rp
	}}
}
func withRetryPolicy(rp retryPolicy) retryOption {
	return retryOption{applyFunc: func(o *options) {
		o.retryPolicy = rp
	}}
}
// withRetryPolicy sets the retry policy of this call.