public Role GetRoleOrNull(int id)
        {
            _logger.Info($"BLL.{nameof(RoleBll)}.{nameof(GetRoleOrNull)}: Getting the role id = " + id);

            if (_roleDao.IsRole(id))
            {
                _logger.Info($"BLL.{nameof(RoleBll)}.{nameof(GetRoleOrNull)}: Role id = {id} received");

                return(_roleDao.GetRole(id));
            }
            else
            {
                _logger.Warn($"BLL.{nameof(RoleBll)}.{nameof(GetRoleOrNull)}: Role id = {id} not found");

                return(null);
            }
        }