code: public Refund get( Refund refund ) {
      return RestfulUtils.show( RefundService.PATH, refund, Refund.class, super.httpClient );
    }
docs: Returns and refresh detailed informations of a specific {@link Refund}.
  @param refund
  A {@link Refund} with Id.
  @return Refreshed instance of the given {@link Refund}.