public function start($text = null) {


        // if text was defined and it the first level of nesting
        if ($text && ($this->nesting === 0)) {

            // display the text with any markup
            $this->clio->display($text)->newLine();

        }

        // add one to the nesting
        ++$this->nesting;

        // chaining
        return $this;
    }