code: def check_usrmove(self, pkgs):
          
          if 'filesystem' not in pkgs:
              return os.path.islink('/bin') and os.path.islink('/sbin')
          else:
              filesys_version = pkgs['filesystem']['version']
              return True if filesys_version[0] == '3' else False
docs: Test whether the running system implements UsrMove.
  
              If the 'filesystem' package is present, it will check that the
              version is greater than 3. If the package is not present the
              '/bin' and '/sbin' paths are checked and UsrMove is assumed
              if both are symbolic links.
  
              :param pkgs: a packages dictionary