Smile\ElasticsuiteCore\Model\Search\Request\RelevanceConfig\Initial\Converter::mergeChildData PHP Method

    private function mergeChildData($nodeData, $childrenData)
    {
        if (is_array($childrenData)) {
            $nodeData = array_merge($nodeData, $childrenData);
            return $nodeData;
        }
        $nodeData = $childrenData;
        return $nodeData;
    }