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<?php
declare(strict_types=1);
namespace OpenTelemetry\SDK\Metrics;
/**
* Instrument type.
*
* Has to be type-hinted as `string|InstrumentType` to be forward compatible.
*/
final class InstrumentType
{
public const COUNTER = 'Counter';
public const UP_DOWN_COUNTER = 'UpDownCounter';
public const HISTOGRAM = 'Histogram';
public const ASYNCHRONOUS_COUNTER = 'AsynchronousCounter';
public const ASYNCHRONOUS_UP_DOWN_COUNTER = 'AsynchronousUpDownCounter';
public const ASYNCHRONOUS_GAUGE = 'AsynchronousGauge';
private function __construct()
{
}
}
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