docs: def get_nodes(self, request):
          """
          This method is used to build the menu tree.
          """
          nodes = []
          for scientist in Scientist.objects.filter(current=True, visible=True):
              node = NavigationNode(
                  scientist.full_name,
                  reverse('lab_members:scientist_detail', args=(scientist.slug,)),
                  scientist.slug
              )
              nodes.append(node)
  
          if Scientist.objects.filter(current=False, visible=True):
              node = NavigationNode(
                  'Lab Alumni',
                  reverse('lab_members:scientist_list') + '#lab-alumni',
                  scientist.slug
              )
              nodes.append(node)
  
          return nodes