code: def update(self, values):
          '''Add iterable *values* to the set'''
          d = self.value_pickler.dumps
          return self.cache.update(tuple((d(v) for v in values))f update(self, values):
          '''Add iterable *values* to the set'''
          d = self.value_pickler.dumps
          return self.cache.update(tuple((d(v) for v in values)))
docs: Add iterable *values* to the set