protected function simpleOpt($opt, $disc = '')
    {
        $type = $this->getOptionType($opt);
        $key = $this->stripOpt($opt);
        //
        if ($type == self::REQUIRED) {
            $key = substr($key, 0, -1);
            $this->addOption($key, null, InputOption::VALUE_REQUIRED, $disc);
            $this->addOptionInput($key, InputOption::VALUE_REQUIRED, $disc);
        } elseif ($type == self::OPTIONAL) {
            $this->addOption($key, null, InputOption::VALUE_NONE, $disc);
            $this->addOptionInput($key, InputOption::VALUE_NONE, $disc);
        } elseif ($type == self::VALUE) {
            $value = $this->getOptionalValue($key);
            //
            $key = $this->getOptionalKeyValue($key);
            //
            $this->addOption($key, null, InputOption::VALUE_OPTIONAL, $disc, $value);
            $this->addOptionInput($key, InputOption::VALUE_OPTIONAL, $disc, $value);
        }
    }