yieldAll static method
Get a list of all waiting messages from all message queues and empty the queues.
Implementation
static List<WaitingMessage> yieldAll() {
List<WaitingMessage> allMessages = [];
messageQueueByChannelId.forEach((channelId, messageQueue) {
allMessages.addAll(messageQueue.waitingMessages);
});
messageQueueByChannelId.clear();
return allMessages;
}