code: public void expectExactMatch(String name, String anotherName, String message) {
          String value = Optional.ofNullable(get(name)).orElse("");
          String anotherValue = Optional.ofNullable(get(anotherName)).orElse("");
  
          if (( StringUtils.isBlank(value) && StringUtils.isBlank(anotherValue) ) || ( StringUtils.isNotBlank(value) && !value.equals(anotherValue) )) {
              addError(name, Optional.ofNullable(message).orElse(messages.get(Validation.EXACT_MATCH_KEY.name(), name, anotherName)));
          } 
      }
docs: Validates to fields to exactly (case-sensitive) match
  
  @param name The field to check
  @param anotherName The other field to check against
  @param message A custom error message instead of the default one