Metadata.php

<?php

declare (strict_types=1);
namespace OpenTelemetry\API\Baggage;

final class Metadata implements MetadataInterface {
    private static ?self $instance = null;
    public static function getEmpty() : Metadata {
        return self::$instance ??= new self('');
    }
    public function __construct(string $metadata) {
    }
    public function getValue() : string {
        return $this->metadata;
    }

}