void remove(MeterRegistry registry) {
            if (opened != null) {
                assert closed != null;
                assert active != null;
                registry.remove(opened);
                registry.remove(closed);
                registry.remove(active);
            }
        }
Creates a new instance with the specified {@link Meter} name.
core/src/main/java/com/linecorp/armeria/client/ConnectionPoolMetrics.java