code: public static Year randomYearAfter(Year after) {
      checkArgument(after != null, "After must be non-null");
      return randomYearAfter(after.getValue());
    }
docs: Returns a random {@link Year} that is after the given {@link Year}.
  
  @param after the value that returned {@link Year} must be after
  @return the random {@link Year}
  @throws IllegalArgumentException if after is null or if after greater than or equal to {@link
  RandomDateUtils#MAX_INSTANT}