public CircuitBreakerBuilder trialRequestInterval(Duration trialRequestInterval) {
        requireNonNull(trialRequestInterval, "trialRequestInterval");
        if (trialRequestInterval.isNegative() || trialRequestInterval.isZero()) {
            throw new IllegalArgumentException(
                    "trialRequestInterval: " + trialRequestInterval + " (expected: > 0)");
        }
        this.trialRequestInterval = trialRequestInterval;
        return this;
    }
Sets the trial request interval in HALF_OPEN state.
Defaults to {@value #DEFAULT_TRIAL_REQUEST_INTERVAL_SECONDS} seconds if unspecified.
core/src/main/java/com/linecorp/armeria/client/circuitbreaker/CircuitBreakerBuilder.java