This interface represents a naming context, which consists of a set of name-to-object bindings
These constants will be used for connecting to different DHT services.
This method is invoked on applications when the underlying node is about
to forward the given message with the provided target to the specified
next hop.
This method is invoked to inform the application that the given node has
either joined or left the neighbor set of the local node, as the set
would be returned by the neighborSet call.