fliXNA_xbox.FlxQuadTree.load C# (CSharp) Method

        public void load(FlxBasic ObjectOrGroup1, FlxBasic ObjectOrGroup2 = null, Func<FlxObject, FlxObject, Boolean> NotifyCallback = null, Func<FlxObject, FlxObject, Boolean> ProcessCallback = null)
        {
            add(ObjectOrGroup1, A_LIST);
            if(ObjectOrGroup2 != null)
            {
                add(ObjectOrGroup2, B_LIST);
                _useBothLists = true;
            }
            else
                _useBothLists = false;
            _notifyCallback = NotifyCallback;
            _processingCallback = ProcessCallback;
        }

        /// <summary>
        /// Returns true if the two FlxObjects overlap.  Optional Callback function of return type bool with two FlxObject parameters will be called if true.
        /// </summary>
        /// <param name="ObjectOrGroup1"></param>
        /// <param name="ObjectOrGroup2"></param>
        /// <param name="NotifyCallback"></param>
        /// <param name="ProcessCallback"></param>
        /// <returns></returns>
        static public Boolean overlap(FlxObject ObjectOrGroup1 = null, FlxObject ObjectOrGroup2 = null, Func <FlxObject, FlxObject, Boolean> NotifyCallback = null, Func <FlxObject, FlxObject, Boolean> ProcessCallback = null)
        {
            if (ObjectOrGroup1 == null)
            {
                ObjectOrGroup1 = FlxG.state;
            }
            if (ObjectOrGroup2 == ObjectOrGroup1)
            {
                ObjectOrGroup2 = null;
            }
            FlxQuadTree.divisions = FlxG.worldDivisions;
            FlxQuadTree quadTree = new FlxQuadTree(FlxG.worldBounds.x, FlxG.worldBounds.y, FlxG.worldBounds.width, FlxG.worldBounds.height);

            quadTree.load(ObjectOrGroup1, ObjectOrGroup2, NotifyCallback, ProcessCallback);
            Boolean result = quadTree.execute();

            quadTree.destroy();
            return(result);
        }