The command address() returns the local AM address of the
-node. AMPacket provides accessors for its two fields, destination and
-type. It also provides commands to set these fields, for the same
+node. AMPacket provides accessors for its four fields, destination,
+source, type and group. It also provides commands to set these
+fields, for the same
reason that Packet allows a caller to set the payload length. Packet
interfaces SHOULD provide accessors and mutators for all of their
fields to enable queues and other buffering to store values in a