Broadcast a message to all connected sockets in the specified room.
Note that this machine does not wait for any kind of acknowledgement of message delivery, so it is immediate/synchronous.
var Socketio = require('machinepack-sockets');
// Broadcast a message to all connected sockets in the specified room.
The name (aka "event name") to use for the message (just an arbitrary label).
The name of the room where this message will be broadcasted.
Data to send with the message.
An unexpected error occurred.