code: def get_info(cls):
          
          mod = try_import(cls.mod_name)
          if not mod:
              return None
          version = getattr(mod, '__version__', None) or getattr(mod, 'version',
                                                                 None)
          return BackendInfo(version or 'deprecated', '')
docs: Return information about backend and its availability.
  
          :return: A BackendInfo tuple if the import worked, none otherwise.