public function has($name)
{
foreach (explode(':', $name) as $p) {
foreach ($this->_arguments as $argument) {
if (strlen($p) === 1) {
if ($argument === '-' . $p) {
return true;
}
} else {
if ($argument === '--' . $p) {
return true;
}
}
}
}
return false;
}