private function _getBodyToolbar()
    {
        if ($this->bodyToolbar !== null) {
            Html::addCssClass($this->bodyToolbarOptions, 'widget-body-toolbar');
            $toolbars = is_string($this->bodyToolbar) ? [$this->bodyToolbar] : $this->bodyToolbar;
            foreach ($toolbars as $toolbar) {
                if (is_array($toolbar)) {
                    $body = isset($toolbar['body']) ? $toolbar['body'] : null;
                    $options = isset($toolbar['options']) ? $toolbar['options'] : [];
                    Html::addCssClass($options, 'widget-body-toolbar');
                    echo Html::tag('div', $body, $options);
                } else {
                    echo Html::tag('div', $toolbar, $this->bodyToolbarOptions);
                }
            }
        }
    }