public function moveChildToPosition(ItemInterface $child, $position)
{
$name = $child->getName();
$order = array_keys($this->children);
$_position = array_search($name, $order);
unset($order[$_position]);
$order = array_values($order);
array_splice($order, $position, 0, $name);
$this->reorderChildren($order);
return $this;
}
