Exemplar.php

<?php

declare (strict_types=1);
namespace OpenTelemetry\SDK\Metrics\Data;

use OpenTelemetry\SDK\Common\Attribute\AttributesInterface;
final class Exemplar {
    public function __construct(int|string $index, float|int $value, int $timestamp, AttributesInterface $attributes, ?string $traceId, ?string $spanId) {
    }
    
    /**
     * @param iterable<Exemplar> $exemplars
     * @return array<list<Exemplar>>
     */
    public static function groupByIndex(iterable $exemplars) : array {
        $grouped = [];
        foreach ($exemplars as $exemplar) {
            $grouped[$exemplar->index][] = $exemplar;
        }
        return $grouped;
    }

}