def sendFrame(self, toId, message):
ackFrame = AckFrame()
ackFrame.setUniqueID(self._UIDProvider.UIDFor(toId))
ackFrame.toSend(self._fromId, toId, message)
self._frameLayer.sendFrame(ackFrame.type(),
ackFrame.fromId(),
ackFrame.toId()
ackFrame.bytes())
if self._deferreds.get(toId) == None:
self._deferreds[toId] = {}
self._deferreds[toId][ackFrame.uniqueID()] = AckDeferred(ackFrame)
return self._deferreds[toId][ackFrame.uniqueID()].promise()
