code: public void batchDeleteEntities(String keyName1, String keyName2) {
      // [START batchDeleteEntities]
      Key key1 = datastore.newKeyFactory().setKind("MyKind").newKey(keyName1);
      Key key2 = datastore.newKeyFactory().setKind("MyKind").newKey(keyName2);
      datastore.delete(key1, key2);
      // [END batchDeleteEntities]
    }
docs: [VARIABLE "my_key_name2"]