def METHOD_NAME(self, group: str, cmd: str, module: ModuleType, short_description: Optional[str] = None) -> None:
    self.command_list[cmd] = module
    self.groups[group].append(cmd)
    if short_description:
        self.cmd_description[cmd] = short_description
    self.longest_cmd = max(self.longest_cmd, len(cmd))