Bootstrap\View\Helper\BootstrapPanelHelper::startGroup PHP Метод

    public function startGroup($options = [])
    {
        $options += ['class' => '', 'role' => 'tablist', 'aria-multiselectable' => true, 'id' => 'panelGroup-' . ++$this->_groupCount, 'collapsible' => true, 'open' => 0];
        $this->config('saved.collapsible', $this->config('collapsible'));
        $this->config('collapsible', $options['collapsible']);
        $this->_autoCloseOnCreate = true;
        $this->_lastPanelClosed = true;
        $this->_groupPanelCount = -1;
        $this->_groupPanelOpen = $options['open'];
        $this->_groupId = $options['id'];
        $this->_groupInGroup = true;
        $options = $this->addClass($options, 'panel-group');
        unset($options['open'], $options['collapsible']);
        return $this->Html->tag('div', null, $options);
    }