protected function execute(InputInterface $input, OutputInterface $output)
    {
        return parent::doExecute($input, $output, true);
    }
protected function execute(InputInterface $input, OutputInterface $output)
    {
        return parent::doExecute($input, $output, true);
    }
protected function execute ( InputInterface $ input , OutputInterface $ output ) { return parent :: doExecute ( $ input , $ output , true ) ; }
Execute the function.

@param  InputInterface  $input
@param  OutputInterface $output
@return int|null
Execute the function .