code: def get_rfu():
      
      global _rfu
      if _rfu:
          return _rfu
  
      plugins = plugins_base_get()
      rfu = []
      for plugin in plugins:
          if isinstance(plugin.regular_file_url, str):
              rfu.append(plugin.regular_file_url)
          else:
              rfu += plugin.regular_file_url
  
      _rfu = rfu
  
      return rfu
docs: Returns a list of al "regular file urls" for all plugins.