interface is the common API for both client-side and
server-side configuration and usage of the Bayeux object.
The common base interface for Bayeux listeners.
A Bayeux channel is the primary message routing mechanism within Bayeux:
both Bayeux clients and Bayeux server use channels to group listeners that
are interested in receiving messages with that channel.
The Bayeux protocol exchange information by means of messages.
The future result of an operation, either a value if the operation
succeeded, or a failure if the operation failed.
A Bayeux session represents a connection between a bayeux client and a bayeux server.
A transport abstract the details of the protocol used to send
Bayeux messages over the network, for example using HTTP or using