public static synchronized void stop(JDA api, String ratelimitIdentifier) {
Map<String, AsyncMessageSender> senders = instances.get(api);
if (senders != null && !senders.isEmpty()) {
AsyncMessageSender sender = senders.get(ratelimitIdentifier);
if (sender != null) {
sender.kill();
senders.remove(ratelimitIdentifier);
}
}
}
