protected function configure()
{
$this->setName('extension:list')->setAliases(array('extension:search'))->addArgument('search', InputArgument::OPTIONAL, 'Search string')->setDescription('List magento connection extensions')->addOption('format', null, InputOption::VALUE_OPTIONAL, 'Output Format. One of [' . implode(',', RendererFactory::getFormats()) . ']');
$help = <<<HELP
* Requires Magento's `mage` shell script.
* Does not work with Windows as operating system.
HELP;
$this->setHelp($help);
}