code: def get_navigation(request):
      
      sections = _get_sections(request)
      trail = _get_trail(request, exclude_section=True)
  
      return mark_safe(render_to_string('navigation.html',
                                        dict(sections=sections,trail=trail)))
docs: Returns the rendered navigation block. Requires that the
      `navigation.html` template exists. Two context variables are passed to it:
  
      * sections (see :func:`get_breadcrumb_sections`)
      * trail (see :func:`get_breadcrumb_trail`)