@Override
    public void close() {
        // This method will be invoked after the connection pool is closed.
        closed = true;
        final ScheduledFuture<?> scheduledFuture = this.scheduledFuture;
        scheduledFuture.cancel(false);
        CLEANUP_EXECUTOR.execute(this::cleanupInactiveMeters);
    }
Creates a new instance with the specified {@link Meter} name.
core/src/main/java/com/linecorp/armeria/client/ConnectionPoolMetrics.java