protected function _doTableLine(&$content, array &$args = array(), $scope = 'body')
    {
        $my_line = '';
        $cell_args = $this->_getArgsStackForTable($args, 'cell', $scope);
        $cell_tag = 'table_'.$scope.'_cell';
        foreach($content as $cell) {
            $my_line .= $this->_tagComposer($cell, $cell_tag, $cell_args);
        }
        $line_args = $this->_getArgsStackForTable($args, 'line', $scope);
        $line_tag = 'table_'.$scope.'_line';
        $content = $this->_tagComposer($my_line, $line_tag, $line_args);
    }