/**
* Executes the current command.
*
* 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.
*
* @param InputInterface $input An InputInterface instance
* @param OutputInterface $output An OutputInterface instance
*
* @return null|int null or 0 if everything went fine, or an error code
*
* @throws \LogicException When this abstract method is not implemented
*/
protected function execute(InputInterface $input, OutputInterface $output)
{
return parent::execute($input, $output);
}