NoopObservableCallback.php

<?php

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

use OpenTelemetry\API\Metrics\ObservableCallbackInterface;

/**
 * @internal
 */
final class NoopObservableCallback implements ObservableCallbackInterface {
    public function detach() : void {
        // no-op
    }

}