@Override
  public String toString() {
    return String.format("%s.orFinally(%s)", subTriggers.get(ACTUAL), subTriggers.get(UNTIL));
  }
@Test
  public void testToString() {
    Trigger trigger = StubTrigger.named("t1").orFinally(StubTrigger.named("t2"));
    assertEquals("t1.orFinally(t2)", trigger.toString());
  }