docs: def menu():
      """
      Return global menu composed from all modules menu.
  
      This method will compose the global menu by calling menu() function for
      module, it should be located under module_path.menu module
      """
      root = MenuItem('')
  
      for mod in droplet.modules():
          if mod.installed:
              module_path = mod.__class__.__module__.rsplit('.', 1)[0]
              menu = import_module(module_path + '.menu')
              if menu:
                  menu.menu(root)
  
      return root