src/Knp/Menu/Util/MenuManipulator.php
public function moveToPosition(ItemInterface $item, $position)
    {
        $this->moveChildToPosition($item->getParent(), $item, $position);
    }
public function moveToPosition(ItemInterface $item, $position)
    {
        $this->moveChildToPosition($item->getParent(), $item, $position);
    }
Moves item to specified position. Rearrange siblings accordingly.

@param ItemInterface $item
@param integer       $position Position to move child to.