static <T extends Response> RetryRuleWithContent<T> onResponse(
            BiFunction<? super ClientRequestContext, ? super T,
                    ? extends CompletionStage<Boolean>> retryFunction) {
        return onResponse(retryFunction, Backoff.ofDefault());
    }
Returns a newly created {@link RetryRuleWithContent} that will retry with
the {@linkplain Backoff#ofDefault() default backoff} if the specified {@code retryFunction} completes
with {@code true}.
core/src/main/java/com/linecorp/armeria/client/retry/RetryRuleWithContent.java