@Override
  public FinishedTriggersBitSet copy() {
    return new FinishedTriggersBitSet((BitSet) bitSet.clone());
  }
@Test
  public void testCopy() throws Exception {
    FinishedTriggersBitSet finishedSet = FinishedTriggersBitSet.emptyWithCapacity(10);
    assertThat(finishedSet.copy().getBitSet(), not(theInstance(finishedSet.getBitSet())));
  }