code: @CanIgnoreReturnValue
    public final StringBuilder appendTo(
        StringBuilder builder, @Nullable Object first, @Nullable Object second, Object... rest) {
      return appendTo(builder, iterable(first, second, rest));
    }
docs: Appends to {@code builder} the string representation of each of the remaining arguments.
  Identical to {@link #appendTo(Appendable, Object, Object, Object...)}, except that it does not
  throw {@link IOException}.