django - How to Create a Mezzanine menu including children elements of current page -

i want create menu handles information current page , siblings example, if have following tree:

if in page child 1 menu should display page 1 , children 1-3

this can achieved following code:

<a href="{{ page.parent.get_absolute_url }}">{{ page.parent.title }}</a>  <ul>     {% page_menu page.parent %} </ul> 

the problem have display grand child 1 , 2 if located in child 2. how can that?

i tried following:

<ul> {% page in branch_page %}     {% if page.is_current_sibling %}      <li><a href="{{ page.get_absolute_url }}"> {{ page.title }}</a>           {% if page.is_current_or_ascendant %}              {% page_menu page %}           {% endif %}       {% endif %} {% endfor %} </ul> 

but doesn't work , not display error, how can in way?

the page_menu template tag lets pass in optional parent page, , menu template used recursively rendering children, eg "page" current page: {% load pages_tags %} {% page_menu page "pages/menus/tree.html" %}

ref: https://groups.google.com/forum/#!msg/mezzanine-users/fk2nm6k6qho/vyepf5d6cxgj