default RetryRuleWithContent<T> orElse(RetryRule other) {
        requireNonNull(other, "other");
        return RetryRuleUtil.orElse(this, other);
    }
Returns a composed {@link RetryRuleWithContent} that represents a logical OR of this
{@link RetryRuleWithContent} and the specified {@link RetryRule}.
If this {@link RetryRuleWithContent} completes with {@link RetryDecision#next()},
then other {@link RetryRule} is evaluated.
core/src/main/java/com/linecorp/armeria/client/retry/RetryRuleWithContent.java