map3.put(a2, new Digest.Entry(25, 26, 26));
map3.put(a3, new Digest.Entry(20, 37, 33));
map3.put(Util.createRandomAddress(), new Digest.Entry(1, 2, 3));
Digest digest3 =new Digest(map3);
diff = digest3.difference(digest);
System.out.println(diff);
Assert.assertEquals(2, diff.size());
diff = digest3.difference(digest2);
System.out.println(diff);