private function parseAggregationsProviders(\DOMXPath $xpath, \DOMNode $rootNode)
    {
        $providers = [];

        foreach ($xpath->query(self::AGGREGATIONS_PROVIDERS_PATH, $rootNode) as $providerNode) {
            $providers[$providerNode->getAttribute('name')] = $providerNode->nodeValue;
        }

        return $providers;
    }