src/Composer/Command/DependsCommand.php
protected function execute(InputInterface $input, OutputInterface $output)
    {
        return parent::doExecute($input, $output, false);
    }
protected function execute(InputInterface $input, OutputInterface $output)
    {
        return parent::doExecute($input, $output, false);
    }
Execute the function.

@param  InputInterface  $input
@param  OutputInterface $output
@return int|null