subscribeEvent
fun <C : EventContent, E : ClientEvent<C>> ClientEventEmitter<*>.subscribeEvent(contentClass: KClass<C>, eventClass: KClass<E>, priority: Int, subscriber: Subscriber<E>): Unsubscriber
inline fun <C : EventContent, E : ClientEvent<C>> ClientEventEmitter<*>.subscribeEvent(priority: Int = Priority.DEFAULT, noinline subscriber: Subscriber<E>): Unsubscriber
Subscribers have to be aware to unsubscribe when the scope of the subscriber is destroyed.
Return
A function to unsubscribe.