V get(Object dataObject)
  {
    return _cache.get(new DataObjectKey(dataObject));
  }
@Test
  public void testKeyNotFound()
  {
    DataObjectToObjectCache<DataTemplate<?>> testCache = new DataObjectToObjectCache<>();

    Assert.assertNull(testCache.get(new Object()));
    Assert.assertNull(testCache.get(new DataMap()));
    Assert.assertNull(testCache.get(new DataList()));
  }