classDiagram
  class Config {
    apply_config(config: dict) None
    finalise_config(config: dict) None
    get_config(config_label: ConfigLabel) dict
    update_config(config_label: ConfigLabel) None
  }
  class IPAddress {
    obj : IPv4Address | IPv6Address
  }
  class Singleton {
  }
  class SingletonProgress {
  }