Backend\Modules\Extensions\Engine\Model::getExtrasData PHP Method

    public static function getExtrasData()
    {
        $extras = (array) BackendModel::getContainer()->get('database')->getRecords('SELECT i.id, i.module, i.type, i.label, i.data
             FROM modules_extras AS i
             INNER JOIN modules AS m ON i.module = m.name
             WHERE i.hidden = ?
             ORDER BY i.module, i.sequence', array('N'));
        $values = array();
        foreach ($extras as $row) {
            $row['data'] = @unserialize($row['data']);
            // remove items that are not for the current language
            if (isset($row['data']['language']) && $row['data']['language'] != BL::getWorkingLanguage()) {
                continue;
            }
            // set URL if needed
            if (!isset($row['data']['url'])) {
                $row['data']['url'] = BackendModel::createURLForAction('Index', $row['module']);
            }
            $name = \SpoonFilter::ucfirst(BL::lbl($row['label']));
            if (isset($row['data']['extra_label'])) {
                $name = $row['data']['extra_label'];
            }
            if (isset($row['data']['label_variables'])) {
                $name = vsprintf($name, $row['data']['label_variables']);
            }
            $moduleName = \SpoonFilter::ucfirst(BL::lbl(\SpoonFilter::toCamelCase($row['module'])));
            if (!isset($values[$row['module']])) {
                $values[$row['module']] = array('value' => $row['module'], 'name' => $moduleName, 'items' => array());
            }
            $values[$row['module']]['items'][$row['type']][$name] = array('id' => $row['id'], 'label' => $name);
        }
        return $values;
    }

 /**
  * Parse
  */
 protected function parse()
 {
     parent::parse();
     // set
     $this->record['url'] = $this->meta->getURL();
     if ($this->id == 1) {
         $this->record['url'] = '';
     }
     // parse some variables
     $this->tpl->assign('item', $this->record);
     $this->tpl->assign('isGod', $this->isGod);
     $this->tpl->assign('templates', $this->templates);
     $this->tpl->assign('positions', $this->positions);
     $this->tpl->assign('extrasData', json_encode(BackendExtensionsModel::getExtrasData()));
     $this->tpl->assign('extrasById', json_encode(BackendExtensionsModel::getExtras()));
     $this->tpl->assign('prefixURL', rtrim(BackendPagesModel::getFullURL($this->record['parent_id']), '/'));
     $this->tpl->assign('formErrors', (string) $this->frm->getErrors());
     // init var
     $showDelete = true;
     // has children?
     if (BackendPagesModel::getFirstChildId($this->record['id']) !== false) {
         $showDelete = false;
     }
     if (!$this->record['delete_allowed']) {
         $showDelete = false;
     }
     // allowed?
     if (!BackendAuthentication::isAllowedAction('Delete', $this->getModule())) {
         $showDelete = false;
     }
     // show delete button
     $this->tpl->assign('showPagesDelete', $showDelete);
     // assign template
     $this->tpl->assignArray($this->templates[$this->record['template_id']], 'template');
     // parse datagrids
     $this->tpl->assign('revisions', $this->dgRevisions->getNumResults() != 0 ? $this->dgRevisions->getContent() : false);
     $this->tpl->assign('drafts', $this->dgDrafts->getNumResults() != 0 ? $this->dgDrafts->getContent() : false);
     // parse the tree
     $this->tpl->assign('tree', BackendPagesModel::getTreeHTML());
 }