Bootstrap\View\Helper\BootstrapFormHelper::_createButtonOptions PHP Метод

    protected function _createButtonOptions(array $options = [])
    {
        $options += ['bootstrap-block' => false];
        $options = $this->_addButtonClasses($options);
        $block = $options['bootstrap-block'];
        unset($options['bootstrap-block']);
        if ($block) {
            $options = $this->addClass($options, 'btn-block');
        }
        return $options;
    }