@Override
  public void onElement(OnElementContext c) throws Exception {
    getRepeated(c).invokeOnElement(c);
  }
@Test
  public void testOnElement() throws Exception {
    setUp(FixedWindows.of(Duration.millis(10)));
    tester.injectElements(37);
    verify(mockTrigger).onElement(Mockito.any());
  }