code: public static <S> PAreaI<S> toPAreaI(final AreaI a)
    {
      Objects.requireNonNull(a, "area");
      return PAreaI.of(a.minimumX(), a.maximumX(), a.minimumY(), a.maximumY());
    }
docs: Convert an area.
  
  @param a   The area
  @param <S> A phantom type parameter indicating the coordinate space of the
  area
  
  @return An area