protected function chooseCMS($availableInputSystems, $availableOutputSystems)
    {

        $this->info("\n************************************************");
        $this->info("\n*********   CMS Migration Manager   ************");
        $this->info("\n************************************************");

        $in = $this->choice('Which input format?', array_keys($availableInputSystems));
        $out = $this->choice('Which output format?', array_keys($availableOutputSystems));
        return array($in, $out);

    }