Retrieves the attachments record, upon which application items can be set/retrieved.
Updates the DeliveryState, and optionally settle the delivery as well.
Gets the current local state for the delivery.
Gets the message format for the current delivery.
Gets the current remote state for the delivery.
Gets the delivery tag for this delivery
Gets whether the delivery was locally settled yet.
Gets whether the delivery was settled by the remote peer yet.
Settles the delivery locally.
@author <a href="http://tfox.org">Tim Fox</a>