/**
* Gets or sets an attribute
*
* When no $value is given, the current content of the attribute is returned.
* An empty string is returned for unset attributes.
*
* When a $value is given, the content is set to that value and the Element
* itself is returned for easy chaining
*
* @param string $name Name of the attribute to access
* @param null|string $value New value to set
* @return string|$this
*/
public function attr($name, $value = null)
{
if (strtolower($name) == 'multiple') {
throw new \InvalidArgumentException('Sorry, the dropdown element does not support the "multiple" attribute');
}
return parent::attr($name, $value);
}
