@Test
public void testCreateBulkMutationBatcher() {

  Batcher<RowMutationEntry, Void> batcher = mock(Batcher.class);
  when(dataClientV2.newBulkMutationBatcher(TABLE_ID)).thenReturn(batcher);
  dataGCJClient.createBulkMutationBatcher(TABLE_ID);
  verify(dataClientV2).newBulkMutationBatcher(TABLE_ID);
}