protected function _addButtonClasses($options)
{
$options += ['bootstrap-type' => $this->config('buttons.type'), 'bootstrap-size' => false];
$type = $options['bootstrap-type'];
$size = $options['bootstrap-size'];
unset($options['bootstrap-type'], $options['bootstrap-size']);
$options = $this->addClass($options, 'btn');
if (!preg_match('#btn-[a-z]+#', $options['class'])) {
$options = $this->addClass($options, 'btn-' . $type);
}
if ($size) {
$options = $this->addClass($options, 'btn-' . $size);
}
return $options;
}
