F.2.4 library(broadcast)
| broadcast/1 | Send event notification |
| broadcast_request/1 | Request all agents |
| listen/2 | Listen to event notifications |
| listen/3 | Listen to event notifications |
| unlisten/1 | Stop listening to event notifications |
| unlisten/2 | Stop listening to event notifications |
| unlisten/3 | Stop listening to event notifications |
| listening/3 | Who is listening to event notifications? |