static public function valueDeleteExtender(RecordValue $valueContainer, $deleteFiles) {
        if ($deleteFiles) {
            /** @var FileColumn $column */
            $column = $valueContainer->getColumn();
            $fileConfig = $column->getConfiguration();
            $pkValue = $valueContainer->getRecord()->getPrimaryKeyValue();
            \File::cleanDirectory($fileConfig->getAbsolutePathToFileFolder($valueContainer->getRecord()));
            if ($pkValue) {
                \File::cleanDirectory($fileConfig->getAbsolutePathToFileFolder($valueContainer->getRecord()));
            }
        }
    }