class FunctionalSurfaceAdditiveShiftFunction implements SurfaceShiftFunction<FunctionalDoublesSurface> {

  @Override
  public FunctionalDoublesSurface evaluate(final FunctionalDoublesSurface surface, final double shift) {
    Validate.notNull(surface, "surface");
    return evaluate(surface, shift, "PARALLEL_SHIFT_" + surface.getName());
  }

}