public static function getOptions()
    {
        return [
            new InputOption('grep',        'G', InputOption::VALUE_REQUIRED, 'Limit to items matching the given pattern (string or regex).'),
            new InputOption('insensitive', 'i', InputOption::VALUE_NONE,     'Case-insensitive search (requires --grep).'),
            new InputOption('invert',      'v', InputOption::VALUE_NONE,     'Inverted search (requires --grep).'),
        ];
    }