code: static Map<String, Object> sizePayload(final Object min, final Object max) {
  		if (min == null || max == null) {
  			return null;
  		}
  		Map<String, Object> payload = new LinkedHashMap<>();
  		payload.put("min", min);
  		payload.put("max", max);
  		payload.put("message", MSG_PREFIX + VALIDATORS.get(Size.class));
  		return payload;
  	}
docs: Creates a new map representing a {@link Size} validation constraint.
  @param min the minimum length
  @param max the maximum length
  @return a map