pulsar-rs
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`negativeAckRedeliveryDelay` & `negativeAckRedeliveryBackoff`
It seems like there isn't an option on Consumer
to set a negativeAckRedeliveryDelay
or negativeAckRedeliveryBackoff
To redeliver messages with different delays, you can use the redelivery backoff mechanism by setting the number of retries to deliver the messages.
cf: https://pulsar.apache.org/docs/2.10.x/concepts-messaging/#negative-acknowledgement