@Override
  public void doDraw() {

    LOGGER.info("doDraw");
  }
@Test
  void testDoDraw() {
    final var ballItem = new BallItem();
    final var ballThread = mock(BallThread.class);
    ballItem.setTwin(ballThread);

    ballItem.draw();
    assertTrue(appender.logContains("draw"));
    assertTrue(appender.logContains("doDraw"));

    verifyNoMoreInteractions(ballThread);
    assertEquals(2, appender.getLogSize());
  }