code: def navigation_info(request):
      '''Expose whether to display the navigation header and footer'''
      if request.GET.get('wafer_hide_navigation') == "1":
          nav_class = "wafer-invisible"
      else:
          nav_class = "wafer-visible"
      context = {
          'WAFER_NAVIGATION_VISIBILITY': nav_class,
      }
      return contexf navigation_info(request):
      '''Expose whether to display the navigation header and footer'''
      if request.GET.get('wafer_hide_navigation') == "1":
          nav_class = "wafer-invisible"
      else:
          nav_class = "wafer-visible"
      context = {
          'WAFER_NAVIGATION_VISIBILITY': nav_class,
      }
      return context
docs: Expose whether to display the navigation header and footer