code: public static function getInstance(OutputInterface $output)
      {
          $questionHelper = new QuestionHelper();
          $application = new Application('PHP to Zephir Command Line Interface', 'Beta 0.2.1');
          $application->getHelperSet()->set(new FormatterHelper(), 'formatter');
          $application->getHelperSet()->set($questionHelper, 'question');
  
          $application->add(ConvertFactory::getInstance($output));
  
          return $application;
      }
docs: Create CLI instance.
  
  @return Application