code: def map_hubs_to_verticals():
      
      vertical_hub_map = {}
      for hub in HUBS_LIST:
          vertical_slug = hub['vertical']['slug']
          if vertical_slug not in vertical_hub_map:
              vertical_hub_map[vertical_slug] = {
                  'name': hub['vertical']['name'],
                  'hubs': [hub['slug']]
              }
          else:
              vertical_hub_map[vertical_slug]['hubs'].append(hub['slug'])
  
      return vertical_hub_map
docs: Return all verticals (sections) mapped to hubs (subsections).