This method is not abstract because you can use this class
as a concrete class. In this case, instead of defining the
execute() method, you set the code to execute by passing
a Closure to the setCode() method.
protected execute ( Symfony\Component\Console\Input\InputInterface $input, Symfony\Component\Console\Output\OutputInterface $output ) : null | integer | ||
$input | Symfony\Component\Console\Input\InputInterface | An InputInterface instance |
$output | Symfony\Component\Console\Output\OutputInterface | An OutputInterface instance |
리턴 | null | integer | null or 0 if everything went fine, or an error code |