private function onCreationComplete(event:FlexEvent):void{
    app = S4M(this.parentApplication);
    var service:HTTPService;
    loadSubsymbols();

    // *************************************************
    // generateRequest
    // *************************************************
    function loadSubsymbols():void {
        service = new HTTPService();
        var action_url:String = "subsymbols.json";
        service.url = api_url + action_url;
        service.method = "GET";
        service.addEventListener(ResultEvent.RESULT, httpResult);
        service.addEventListener(FaultEvent.FAULT, httpFault);
        service.contentType = "application/json"
        service.headers = { Accept:"application/json" };
        service.send();
    }
}

    // *************************************************
    // connectionSuccess
    // *************************************************
    private function httpResult(event:ResultEvent):void {
        var json:String = event.result as String;
        var obj:Object = JSON.decode(json);
        var tree:Object = obj.tree;
        treeView.dataProvider = object2json(tree);
        //MonsterDebugger.trace(this, treeView.dataProvider);
        MonsterDebugger.trace(this, treeView.selectedItem.label);
    }

    // *************************************************
    // generateJSONfromObject
    // *************************************************
    private function object2json(node:Object):Object{
        var name:String = node.name;
        var children:Array = new Array();
        if(isThereChildren(node)){
            for(var child:String in node.children){
                children.push(object2json(node.children[child]));
            }
        }

        if(isThereSubsymbols(node)){
            children.push(object2json(node.subsymbols[0]));
        }

        if(doYouHaveSomething(node)){
            return {label: name, children: children}
        }else{
            return {label: name}
        }
    }

    private function isThereChildren(nd:Object):Boolean{
        return nd.children
    }

    private function isThereSubsymbols(nd:Object):Boolean{
        return nd.subsymbols
    }

    private function doYouHaveSomething(nd:Object):Boolean{
        return nd.children || nd.subsymbols
    }

    // *************************************************
    // connectionFailure
    // *************************************************
    private function httpFault(event:FaultEvent):void {
        var faultstring:String = event.fault.faultString;
        Alert.show(faultstring);
    }