getCountByPriority method
Get count of messages by priority
Implementation
Map<MessagePriority, int> getCountByPriority() {
final counts = <MessagePriority, int>{};
for (int i = 0; i < MessagePriority.values.length; i++) {
counts[MessagePriority.values[i]] = _priorityQueues[i].length;
}
return counts;
}