code: def put(self, key, value):
      '''Stores the object `value` named by `key`self.
         Writes to both ``cache_datastore`` and ``child_datastore``.
      '''
      self.cache_datastore.put(key, value)
      self.child_datastore.put(key, valuef put(self, key, value):
      '''Stores the object `value` named by `key`self.
         Writes to both ``cache_datastore`` and ``child_datastore``.
      '''
      self.cache_datastore.put(key, value)
      self.child_datastore.put(key, value)
docs: Stores the object `value` named by `key`self.
         Writes to both ``cache_datastore`` and ``child_datastore``.