Cannot find a way to successfully broadcast about socket.io HOT 3 CLOSED

custom := io.Of(
	regexp.MustCompile(`/\w+`),
	nil,
)
custom.On("connection", func(clients ...interface{}) {
	socket := clients[0].(*socket.Socket)
	socket.Broadcast().Emit("Broadcast", "To all connected clients except the sender")
	custom.Emit("Broadcast", "broadcast to namespace \\w+ matches")
	io.Emit("Broadcast", "broadcast to the default namespace /")
})

// this will have a client leave their room and join all other existing rooms
// once joining it will make a broadcast to that room
// obviously a weird thing to do
// but I am just trying to prove in a simple way that a client is sharing a room
io.Sockets().Adapter().Rooms().Range(func(sid, value interface{}) bool {

  // skip over your own room
  if socket.Room(client.Id()) != sid.(socket.Room) {

    // prints all rooms
    io.Sockets().Adapter().Rooms().Range(func(room, value interface{}) bool {
      log.Print("  - ", room)
      return true
    })

    log.Print(fmt.Sprintf("%v ➡️  %v", socket.Id(), sid)))

    // leave current room and join a room it found another client on
    client.Leave(socket.Room(socket.Id()))
    client.Join(sid.(socket.Room))

    // prints all rooms
    io.Sockets().Adapter().Rooms().Range(func(room, value interface{}) bool {
      log.Print("  - ", room)
      return true
    })

    client.Broadcast().To(sid.(socket.Room)).Emit("chat", "hi")
  }
  return true
})