private long nextCleanupDelaySeconds() {
        // Schedule the cleanup task randomly between cleanupDelayMinutes and 2 * cleanupDelayMinutes.
        return cleanupDelaySeconds + ThreadLocalRandom.current().nextInt(cleanupDelaySeconds);
    }
Creates a new instance with the specified {@link Meter} name.
core/src/main/java/com/linecorp/armeria/client/ConnectionPoolMetrics.java