public function deleteCommand($packageKey)
{
if (!$this->packageManager->isPackageAvailable($packageKey)) {
$this->outputLine('The package "%s" does not exist.', [$packageKey]);
$this->quit(1);
}
$this->packageManager->deletePackage($packageKey);
$this->outputLine('Deleted package "%s".', [$packageKey]);
Scripts::executeCommand('neos.flow:cache:flush', $this->settings, false);
$this->sendAndExit(0);
}