code: public static AreaBD area(final AreaSizeBD size)
    {
      Objects.requireNonNull(size, "Size");
      return AreaBD.of(
        BigDecimal.ZERO,
        size.sizeX(),
        BigDecimal.ZERO,
        size.sizeY());
    }
docs: Construct an area at the origin that has the same size as {@code size}.
  
  @param size The area size
  
  @return An area at the origin