waitForMessage method
Implementation
Future<ButtplugServerMessage> waitForMessage(int id) async {
if (!_waitingFutures.containsKey(id)) {
logError("No message with $id currently being waited on");
throw ButtplugMessageException("No message with $id currently being waited on");
}
return await _waitingFutures[id]!.completionFuture;
}