@Override
  public boolean checkInput(String inputString) {
    if (StringUtil.isEmptyOrSpaces(inputString)) {
      return false;
    }
    if (containsIllegalSymbols(inputString)) return false;
    return !isReservedWord(inputString) && !onlyDigits(inputString) && !hasConflictsWithAnotherNames(inputString);
  }
@Override
  public boolean checkInput(String inputString)