### Question:
SettlementItemId implements Serializable { public SettlementItemId() { } SettlementItemId();  SettlementItemId(String settlementThreadId, String threadId);   }### Answer:
@Test public void testSettlementItemId() { SettlementItemId settlementItemId = new SettlementItemId("settlementThreadId", "threadId"); assertEquals("settlementThreadId", settlementItemId.getSettledThreadId()); assertEquals("threadId", settlementItemId.getThreadId()); }