default CircuitBreakerRule orElse(CircuitBreakerRule other) {
        return CircuitBreakerRuleUtil.orElse(this, requireNonNull(other, "other"));
    }
Returns a composed {@link CircuitBreakerRule} that represents a logical OR of
this {@link CircuitBreakerRule} and another. If this {@link CircuitBreakerRule} completes with
{@link CircuitBreakerDecision#next()}, then other {@link CircuitBreakerRule} is evaluated.
core/src/main/java/com/linecorp/armeria/client/circuitbreaker/CircuitBreakerRule.java