@Test
public void testClone() {

	Empty clone = empty.clone();
	assertEquals(empty.toString(), clone.toString());
	assertEquals(empty.toJsonObject(), clone.toJsonObject());
	assertEquals(empty.getMessageType(), clone.getMessageType());
	assertNotSame(empty, clone);
	assertNotSame(empty.toString(), clone.toString());
	assertNotSame(empty.toJsonObject(), clone.toJsonObject());
}