public function importBundleTranslationFiles(ImportCommand $importCommand)
    {
        $importBundle = strtolower($importCommand->getDefaultBundle());

        if ($importBundle == 'all') {
            $importCount = $this->importAllBundlesTranslationFiles($importCommand);

            if (Kernel::VERSION_ID >= 40000) {
                $importCount += $this->importSf4TranslationFiles($importCommand);
            }

            return $importCount;
        } elseif ($importBundle == 'custom') {
            return $this->importCustomBundlesTranslationFiles($importCommand);
        } else {
            if (Kernel::VERSION_ID >= 40000) {
                return $this->importSf4TranslationFiles($importCommand);
            }

            return $this->importOwnBundlesTranslationFiles($importCommand);
        }
    }