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<?php
declare(strict_types=1);
namespace OpenTelemetry\SDK\Metrics;
use OpenTelemetry\SDK\Metrics\Data\Metric;
interface MetricSourceInterface
{
/**
* Returns the last metric collection timestamp.
*
* @return int last collection timestamp
*/
public function collectionTimestamp(): int;
/**
* Collects metric data from the underlying provider.
*
* @return Metric collected metric
*/
public function collect(): Metric;
}
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