Iterator itr = rs2.rrs();
assertEquals(m_a1, itr.next());
assertEquals(m_a2, itr.next());
assertFalse(itr.hasNext());
itr = rs2.sigs();
assertTrue(itr.hasNext());
assertEquals(m_s1, itr.next());
assertTrue(itr.hasNext());
assertEquals(m_s2, itr.next());
assertFalse(itr.hasNext());