How to reject a message and I'd like to contribute

[FROGGS]

Hi, I struggled for the past couple of deas getting a dead-letter-exchange to be created, but now I'm unable to use it.

I can ack a message when I set no_ack to false. Note this is in an on-message callback of a channel:

$consumer->channel->ack($message)->deliver;

Though when I reject a message like this to forward it to the dead-letter-exchange:

$consumer->channel->reject(requeue => 0)->deliver;

I get:

[2022-07-28 07:32:08.44986] [134610] [info] RabbitMQ[#1] Consumer ready
[2022-07-28 07:32:08.45701] [134610] [debug] RabbitMQ: received message
-> "\1\0\1\0\0\0\r\0<\0Z\0\0\0\0\0\0\0\0\0\316"
<- "\1\0\1\0\0\0007\0\24\0(\1\226,PRECONDITION_FAILED - unknown delivery tag 0\0<\0Z\316"
-> "\1\0\1\0\0\0\4\0\24\0)\316"
[2022-07-28 07:32:08.51695] [134610] [warn] RabbitMQ[#1] Channel closed

So, after digging more around I found out that I need to set multiple => 0, so this works:

$consumer->channel->reject(delivery_tag => 1, multiple => 0, requeue => 0)->deliver;

To spare others from going through this rabbit hole (pun intended), I'd like to contribute to the documentation.
Can you please give me a commit bit here on gitlab and perhaps co-maint on pause? My PAUSE-ID is FROGGS.