code: def get_multi(self, keys, get_cas=False):
          
          d = {}
          if keys:
              for server in self.servers:
                  results = server.get_multi(keys)
                  if not get_cas:
                      # Remove CAS data
                      for key, (value, cas) in results.items():
                          results[key] = value
                  d.update(results)
                  keys = [_ for _ in keys if _ not in d]
                  if not keys:
                      break
          return d
docs: Get multiple keys from server.
  
          :param keys: A list of keys to from server.
          :type keys: list
          :param get_cas: If get_cas is true, each value is (data, cas), with each result's CAS value.
          :type get_cas: boolean
          :return: A dict with all requested keys.
          :rtype: dict