protected AttemptSysMsgRedeliverySpec(AttemptSysMsgRedeliverySpecConfig config) : base(config, typeof(AttemptSysMsgRedeliverySpec))
 {
     _config = config;
 }
 protected AttemptSysMsgRedeliverySpec(AttemptSysMsgRedeliverySpecConfig config) : base(config)
 {
     _config = config;
 }