AMQPHelpers.Reliability.Producer.setup_channel

You're seeing just the function setup_channel, go back to AMQPHelpers.Reliability.Producer module for more information.
Link to this function

setup_channel(producer)

Specs

setup_channel(GenServer.server()) :: :ok

Setups the channel for reliable message delivery.

This function is used to setup reliable message delivery when setup_channel_on_init is set to false. Not required by default but useful for testing purposes.