code: def store(self, key, expiry, data):
          
          self.cache.set(key, (expiry, data), self.cache_ttl)
  
          if getattr(settings, 'CACHEBACK_VERIFY_CACHE_WRITE', True):
              # We verify that the item was cached correctly.  This is to avoid a
              # Memcache problem where some values aren't cached correctly
              # without warning.
              __, cached_data = self.cache.get(key, (None, None))
              if data is not None and cached_data is None:
                  raise RuntimeError(
                      "Unable to save data of type %s to cache" % (
                          type(data)))
docs: Add a result to the cache
  
          :key: Cache key to use
          :expiry: The expiry timestamp after which the result is stale
          :data: The data to cache