framework/RedKiteCms/Content/PageCollection/PermalinkManager.php
public function update($previousPermalink, $newPermalink)
    {
        $blocks = $this->permalinks[$previousPermalink];
        $this->remove($previousPermalink);
        $this->permalinks[$newPermalink] = $blocks;

        return $this;
    }
public function update($previousPermalink, $newPermalink)
    {
        $blocks = $this->permalinks[$previousPermalink];
        $this->remove($previousPermalink);
        $this->permalinks[$newPermalink] = $blocks;

        return $this;
    }
Updates a permalink

@param $previousPermalink
@param $newPermalink

@return $this