in node/app.js [326:342]
function receivedDeliveryConfirmation(event) {
var senderID = event.sender.id;
var recipientID = event.recipient.id;
var delivery = event.delivery;
var messageIDs = delivery.mids;
var watermark = delivery.watermark;
var sequenceNumber = delivery.seq;
if (messageIDs) {
messageIDs.forEach(function(messageID) {
console.log("Received delivery confirmation for message ID: %s",
messageID);
});
}
console.log("All message before %d were delivered.", watermark);
}