/**
* {@inheritdoc}
*/
public function removeInstanceId($instance_id)
{
parent::removeInstanceId($instance_id);
unset($this->originalOrder[$instance_id]);
unset($this->configurations[$instance_id]);
}
/**
* {@inheritdoc}
*/
public function addInstanceId($id, $configuration = NULL)
{
parent::addInstanceId($id, $configuration);
if ($configuration !== NULL) {
$this->setConfiguration($configuration);
}
}