Interface for channel listeners. If a ChannelListener is added to a channel,
then for each transmission, it is notified and given all pertinent
information, including the transmission properties, the token transmitted,
source port and the destination port.
React to a transmission on the channel on which this is listening.
The channel will call this method after a transmission occurs,
which means that the transmission properties seen by this method
are they same as those seen by the destination.
properties - The transmission properties after they have
been transformed by any registered PropertyTransformers.