eZ\Publish\Core\REST\Common\Input\ParserTools::isEmbeddedObject PHP Method

    public function isEmbeddedObject(array $objectElement)
    {
        foreach ($objectElement as $childKey => $childValue) {
            $childKeyIndicator = substr($childKey, 0, 1);
            if ($childKeyIndicator !== '#' && $childKeyIndicator !== '_') {
                return true;
            }
        }
        return false;
    }