public void assertSmallerThan(String value, String... identifier) {
GwtInstance gwtInstance = object(identifier);
Object actual = gwtInstance.getRaw();
if (actual == null) {
fail(prefix() + "number is null: " + gwtInstance.identifierToString());
} else if (actual instanceof Integer) {
assertThat((Integer) actual).as(prefix() + "Integer").isLessThan(Integer.parseInt(value));
} else if (actual instanceof Long) {
assertThat((Long) actual).as(prefix() + "Long").isLessThan(Long.parseLong(value));
} else if (actual instanceof Double) {