/**
* Insert a form element before another element
*
* @param string $name
* @param Element\AbstractElement $e
* @throws Exception
* @return Form
*/
public function insertElementBefore($name, Element\AbstractElement $e)
{
$i = $this->getElementIndex($name);
if (null === $i) {
throw new Exception('Error: That element does not exist.');
}
// If the element is the top of element of a group, switch out for the new element being inserted before
foreach ($this->groups as $key => $group) {
if ($group == $name) {
$this->groups[$key] = $e->getName();
}
}
$this->childNodes = array_merge(array_slice($this->childNodes, 0, $i), [$e], array_slice($this->childNodes, $i));
return $this;
}
