docs: @BetaApi(
        "The surface for long-running operations is not stable yet and may change in the future.")
    public final OperationFuture<Empty, Struct> batchCreateEntitiesAsync(
        EntityTypeName parent, List<EntityType.Entity> entities) {
  
      BatchCreateEntitiesRequest request =
          BatchCreateEntitiesRequest.newBuilder()
              .setParent(parent == null ? null : parent.toString())
              .addAllEntities(entities)
              .build();
      return batchCreateEntitiesAsync(request);
    }