If returned from a handler, the message will NOT be acknowledged and will be requeued.
If true, the message will be requeued, otherwise it will be discarded.
Create a new MqError instance.
If true, the message will be requeued.
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If returned from a handler, the message will NOT be acknowledged and will be requeued.
Param: requeue
If true, the message will be requeued, otherwise it will be discarded.