code: public List<Entity> fetchEntitiesWithKeys(String firstKeyName, String secondKeyName) {
      // [START fetchEntitiesWithKeys]
      KeyFactory keyFactory = datastore.newKeyFactory().setKind("MyKind");
      Key firstKey = keyFactory.newKey(firstKeyName);
      Key secondKey = keyFactory.newKey(secondKeyName);
      List<Entity> entities = datastore.fetch(Lists.newArrayList(firstKey, secondKey));
      for (Entity entity : entities) {
        // do something with the entity
      }
      // [END fetchEntitiesWithKeys]
      return entities;
    }
docs: [VARIABLE "my_second_key_name"]