NoopUpDownCounter.php

<?php

declare (strict_types=1);
namespace OpenTelemetry\API\Metrics\Noop;

use OpenTelemetry\API\Metrics\UpDownCounterInterface;

/**
 * @internal
 */
final class NoopUpDownCounter implements UpDownCounterInterface {
    public function add($amount, iterable $attributes = [], $context = null) : void {
        // no-op
    }
    public function isEnabled() : bool {
        return false;
    }

}