@Override
  public long getWorkerCount() {
    return asyncExecutionMonitoring.getWorkerCount();
  }
@Test
  public void getWorkerCount_delegates_to_AsyncExecutionMonitoring() {
    when(asyncExecutionMonitoring.getWorkerCount()).thenReturn(12);

    assertThat(underTest.getWorkerCount()).isEqualTo(12);

    verify(asyncExecutionMonitoring).getWorkerCount();
  }