AS3 Function reference

    import flash.sampler.getSavedThis;
    import flash.utils.describeType;

static public function getReference(f:Function):String
        {

            var t:Object = getSavedThis(f);

            var methods:XMLList = describeType(t)..method.@name;
            for each (var m:String in methods)
            {

                if (t.hasOwnProperty(m) && t[m] != null && t[m] === f)
                    return t.toString() + "::" + m;
            }
            return null;

        }

// only public functions