code: @Override
      public void readFragmentFrom(MwsReader r) {
          nextToken = r.read("NextToken", String.class);
          createdBefore = r.read("CreatedBefore", XMLGregorianCalendar.class);
          lastUpdatedBefore = r.read("LastUpdatedBefore", XMLGregorianCalendar.class);
          orders = r.readList("Orders", "Order", Order.class);
      }
docs: Read members from a MwsReader.
  
  @param r
  The reader to read from.