code: public static <D extends Comparable> DateExpression<D> addYears(DateExpression<D> date, int years) {
          return Expressions.dateOperation(date.getType(), Ops.DateTimeOps.ADD_YEARS, date, ConstantImpl.create(years));
      }
docs: Add the given amount of years to the date
  
  @param date date
  @param years years to add
  @return converted date