assertThat(args, RestfulMatchers.mapHas("from"));
assertThat(args, RestfulMatchers.mapHas("to"));
// when
args = JsonRepresentation.newMap();
args.mapPut("from.value", 0);
args.mapPut("to.value", 1);
args.mapPut("nonExistent.value", 2);
assertThat(args.size(), is(3));
final RestfulResponse<ActionResultRepresentation> restfulResponse = client.followT(invokeLink, args);