ImmutableMultimap.Builder<String, String> permBuilder = ImmutableMultimap.builder();
permBuilder.put("adrian", "adriancole");
SecurityGroup origGroup = new SecurityGroupBuilder().id("13").build();
SecurityGroup newGroup = extension.addIpPermission(IpProtocol.TCP, 22, 22,
permBuilder.build(), emptyStringSet(), emptyStringSet(), origGroup);
assertEquals(1, newGroup.getIpPermissions().size());
IpPermission newPerm = Iterables.getOnlyElement(newGroup.getIpPermissions());