public function __construct()
{
$this->output = new SymfonyConsoleOutput();
$this->output->getFormatter()->setStyle('b', new OutputFormatterStyle(null, null, ['bold']));
$this->output->getFormatter()->setStyle('i', new OutputFormatterStyle('black', 'white'));
$this->output->getFormatter()->setStyle('u', new OutputFormatterStyle(null, null, ['underscore']));
$this->output->getFormatter()->setStyle('em', new OutputFormatterStyle(null, null, ['reverse']));
$this->output->getFormatter()->setStyle('strike', new OutputFormatterStyle(null, null, ['conceal']));
$this->output->getFormatter()->setStyle('error', new OutputFormatterStyle('red'));
$this->output->getFormatter()->setStyle('success', new OutputFormatterStyle('green'));
}