ForConsidersKeyAsString.as

var dict:Dictionary = new Dictionary();
var abesi:Sprite = new Sprite();
var hidebu:Sprite = new Sprite();
dict[abesi] = "abesi";
dict[hidebu] = "hidebu";

trace(dict[abesi]);
// "abesi"


for each (var value:String in dict) {
    trace(value);
    // works fine
}


for (var keyAsSprite:Sprite in dict) {
    trace(keyAsSprite);
    // compile error - "keyAsSprite is not String"
    // fxxx Flex SDK
}


for (var keyAsObject:Object in dict) {
    trace(keyAsObject);
    // now it works
    keyAsObject.addChild(new Sprite());
    // this works too as we're expecting
}