This allows you to register types that'll be broadcast to receivers
```rust
struct Message { data: String }
let mut map = EventMap::new();
// nothing is registered by default
asserteq!(map.isempty::
// register two subscriptions for the message
// you can get a blocking iterator
let mut m1 = map.registeriter::
let msg = Message{ data: String::from("hello world") };
// send the message, will return a bool if any messages were sent
asserteq!(map.send(msg.clone()), true);
// we should have 2 still active
asserteq!(map.active::
asserteq!(m1.next().unwrap(), msg); // m2 is a stream, so we have to await it (and use StreamExt::next) asserteq!(m2.next().await.unwrap(), msg);
// drop a subscription (will be cleaned up in the eventmap on next send) drop(m1);
let msg = Message{ data: String::from("testing") };
asserteq!(map.send(msg.clone()), true);
// we only have 1 active now
asserteq!(map.active::
simple_event_map
is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0).
See LICENSE-APACHE and LICENSE-MIT for details.