protected function backupParametersFile($kernelDir)
{
$filesystem = new Filesystem();
if ($filesystem->exists($kernelDir . '/config/parameters.yml')) {
$filesystem->copy($kernelDir . '/config/parameters.yml', $kernelDir . '/config/parameters.yml~backup');
}
if ($filesystem->exists($kernelDir . '/cache/test')) {
$filesystem->remove($kernelDir . '/cache/test');
}
}