public static function check($document)
{
self::$doc = $document;
// Don't do anything if this is a new document or a user document
if (!$document->getVersion() || $document->getModule() === 'users') {
return;
}
if (self::fields_removed() >= 4 || self::i18n_fields_removed() >= 3) {
self::signal();
}
}
