final protected function printHelp()
    {
        $script = $this->parser->getScriptName();

        $this->printUsage($script);

        $this->printDescription();

        /** @var $option Option */
        foreach ($this->options as $option) {
            echo " " . $option . "\n";
        }

        echo "\n";

        $this->notify("output");

        $this->notify("shutdown");

        return 0;
    }