@SuppressWarnings("CheckReturnValue")
  default void use() {
    ImmutableCancelParam.of(1).withAux(1, 2, 3);
  }
Compilation test. Cancel out parameter from allParameters
without this annotation, this would result
in compilation error: parameters should be defined on a same level
value-fixture/src/org/immutables/fixture/CancelParam.java