public int evict(int evictionQuota){
	int counter = 0;

	for(ConcurrentHashMap<Integer, SpaceEvictionStrategy> priorityLevel : getPriorities().values()){
		if(counter == evictionQuota)
			break;
		if(priorityLevel.isEmpty())
			continue;
		for (SpaceEvictionStrategy strategy : priorityLevel.values()) {
			counter += strategy.evict(evictionQuota - counter);
			if(counter == evictionQuota)
				break;
		}
	}
	return counter;
}