ConstReadonlyAll: "all"ReadonlyExplicit: "explicit"All sequences must be explicitly acknowledged
ReadonlyFlowControl: "flow_control"Functions like AckAll, but acks based on flow control responses. Used for durable mirror/source consumers (ADR-60). Available on server 2.14+.
ReadonlyNone: "none"Messages don't need to be Ack'ed.
Ack, acknowledges all messages with a lower sequence