code: def snapshot(self, mode):
          '''
          Take a snapshot of the system.
          '''
          self._init_env()
  
          self._save_cfg_packages(self._get_changed_cfg_pkgs(self._get_cfg_pkgs()))
          self._save_payload(*self._scan_payload()f snapshot(self, mode):
          '''
          Take a snapshot of the system.
          '''
          self._init_env()
  
          self._save_cfg_packages(self._get_changed_cfg_pkgs(self._get_cfg_pkgs()))
          self._save_payload(*self._scan_payload())
docs: Take a snapshot of the system.