/**
  * @param \Symfony\Component\Console\Input\InputInterface   $input
  * @param \Symfony\Component\Console\Output\OutputInterface $output
  */
 protected function initialize(InputInterface $input, OutputInterface $output)
 {
     parent::initialize($input, $output);
     $configPath = $input->getOption('config');
     $this->config = $configPath ? Configuration::fromFile($configPath) : Configuration::defaults('php-semver-checker');
     $inputMerger = new InputMerger();
     $inputMerger->merge($input, $this->config);
     // Set overrides
     LevelMapping::setOverrides($this->config->getLevelMapping());
 }