/**
* Returns the first ID of an item in any of the Management API
* collections. This was added to make the traversal code easier
* to read.
* @param collection $collection Any Management API collection.
* @return string The ID of the first item in a collection.
*/
private function getFirstId(&$collection)
{
$items = $collection->getItems();
return $items[0]->getId();
}
