Map<Address, int[]> getRemotePartitionAssignment() {
        return remotePartitionAssignment;
    }
@Test
    public void testRemotePartitionAssignment() {
        assertEquals(2, a.getRemotePartitionAssignment().size()); // only remote members are included
        assertArrayEquals(new int[]{2, 4}, a.getRemotePartitionAssignment().get(a1));
        assertArrayEquals(new int[]{1, 5}, a.getRemotePartitionAssignment().get(a2));
    }