@Override
  protected void addWordToStorage(String word, int frequency) {
    // not going to support addition of contacts!
  }
@Test
  public void testAddWordToStorageDoesNotHaveEffect() throws Exception {
    mDictionaryUnderTest.addWordToStorage("aword", 126);
    TestRxSchedulers.drainAllTasks();
    Assert.assertFalse(mDictionaryUnderTest.isValidWord("aword"));
  }