assertEquals("a:00;00:b", j.useForNull("00").join(entriesWithNulls));
assertEquals("a:00;00:b", j.useForNull("00").join(entriesWithNulls.iterator()));
StringBuilder sb1 = new StringBuilder();
j.appendTo(sb1, ImmutableMultimap.of(1, 2, 3, 4, 5, 6, 1, 3, 5, 10).entries());
assertEquals("1:2;1:3;3:4;5:6;5:10", sb1.toString());
StringBuilder sb2 = new StringBuilder();
j.appendTo(sb2, ImmutableMultimap.of(1, 2, 3, 4, 5, 6, 1, 3, 5, 10).entries().iterator());
assertEquals("1:2;1:3;3:4;5:6;5:10", sb2.toString());