protected function BackLink()
    {
        $selected = $this->SelectedTreeID();
        switch ($this->Location()) {
            case Enums\ContentLocation::Page():
                return $this->PageBackLink($selected);

            case Enums\ContentLocation::Layout():
                return $this->LayoutBackLink($selected);

            case Enums\ContentLocation::Container():
                return $this->ContainerBackLink($selected);
        }
    }