private static void validateAttributeDescription(char c) {
        if (c != '-' && !(isAlphabeticOrDigit(c))) {
            throw new LdapException(ResultCode.FILTER_ERROR, "Invalid attribute description");
        }
    }
@author James Chen
@implSpec <a href="https://tools.ietf.org/html/rfc4515"> RFC 4515: String Representation of
          Search Filters</a>
turms-gateway/src/main/java/im/turms/gateway/infra/ldap/element/operation/search/Filter.java