public function execute(&$rootDoc)
    {
        $docletFile = $this->fixPath($this->_docletPath).$this->_doclet.'/'.$this->_doclet.'.php';
        if (is_file($docletFile)) { // load doclet
            $this->message('Loading doclet "'.$this->_doclet.'"');
            require_once($this->fixPath($this->_docletPath).'/doclet.php');
            require_once($docletFile);
            $doclet =& new $this->_doclet($rootDoc, $this->getFormatter());
        } else {
            $this->error('Could not find doclet "'.$docletFile.'"');
        }
        $this->message('Done ('.round($this->_getTime() - $this->_startTime, 2).' seconds)');
    }