protected function _getFormSubmitExtraLeftButtons()
    {
        $action = $this->_action();
        $buttons = $action->getConfig('scaffold.form_submit_extra_left_buttons');

        if ($buttons === false) {
            return [];
        }

        if ($buttons === null || $buttons === true) {
            $buttons = $this->_getDefaultExtraLeftButtons();
        }

        return $buttons;
    }