Delivery that can be manually acknowledged or rejected.Sender.Channel and close when sending messages.ChannelPool instances.ChannelPool.Channel proxy that re-open the underlying channel if necessary.Receiver#consume* methods.Channel is disposed.Channel to use for sending a flux of messages.Connection that ensure closing is idempotent.Sender.Flux.Receiver creation.Sender.Sender creation.Sender#send* methods.Channels.