in src/main/java/com/twitter/whiskey/net/SpdyStreamManager.java [154:165]
public boolean hasNext() {
if (sentinel != mutations) throw new ConcurrentModificationException();
if (streamIterator.hasNext()) return true;
while (++setIndex < PRIORITY_LEVELS) {
streamIterator = streamSets[setIndex].iterator();
if (streamIterator.hasNext()) return true;
}
return false;
}