Image caching

package org.corlan.utils {
	import spark.core.ContentCache;
 
	public class ImageCache {
 
		private static var _instance:ImageCache;
 
		public var cache:ContentCache;
 
		public function ImageCache(s:Singleton, maxCacheEntries:int=100) {
			cache = new ContentCache();
			cache.maxCacheEntries = maxCacheEntries;
		}
 
		public static function getInstance(maxCacheEntries:int=100):ImageCache {
			if (ImageCache._instance == null) {
				ImageCache._instance = new ImageCache(new Singleton(), maxCacheEntries);
			}
			return ImageCache._instance;
		}
	}
}
 
class Singleton {}