protected function renderEnvironment()
    {
        $def = $this->def;

        $ret = '';

        $ret .= $this->start('table');
        $ret .= $this->element('caption', 'Environment');

        $ret .= $this->row('Parent of fragment', $def->info_parent);
        $ret .= $this->renderChildren($def->info_parent_def->child);
        $ret .= $this->row('Block wrap name', $def->info_block_wrapper);

        $ret .= $this->start('tr');
        $ret .= $this->element('th', 'Global attributes');
        $ret .= $this->element('td', $this->listifyAttr($def->info_global_attr), null, 0);
        $ret .= $this->end('tr');

        $ret .= $this->start('tr');
        $ret .= $this->element('th', 'Tag transforms');
        $list = array();
        foreach ($def->info_tag_transform as $old => $new) {
            $new = $this->getClass($new, 'TagTransform_');
            $list[] = "<$old> with $new";
        }
        $ret .= $this->element('td', $this->listify($list));
        $ret .= $this->end('tr');

        $ret .= $this->start('tr');
        $ret .= $this->element('th', 'Pre-AttrTransform');
        $ret .= $this->element('td', $this->listifyObjectList($def->info_attr_transform_pre));
        $ret .= $this->end('tr');

        $ret .= $this->start('tr');
        $ret .= $this->element('th', 'Post-AttrTransform');
        $ret .= $this->element('td', $this->listifyObjectList($def->info_attr_transform_post));
        $ret .= $this->end('tr');

        $ret .= $this->end('table');
        return $ret;
    }