protected function _displayHelp($command)
{
$format = 'text';
if (!empty($this->args[0]) && $this->args[0] === 'xml') {
$format = 'xml';
$this->_io->outputAs(ConsoleOutput::RAW);
} else {
$this->_welcome();
}
return $this->out($this->OptionParser->help($command, $format));
}