function startGroup(&$group, $required, $error)
    {
        $name = $group->getName();
        $this->_groupTemplate        = $this->_prepareTemplate($name, $group->getLabel(), $required, $error);
        $this->_groupElementTemplate = empty($this->_groupTemplates[$name])? '': $this->_groupTemplates[$name];
        $this->_groupWrap            = empty($this->_groupWraps[$name])? '': $this->_groupWraps[$name];
        $this->_groupElements        = array();
        $this->_inGroup              = true;
    }