NodeFactory.CreateNodeMenu C# (CSharp) Метод

    public static void CreateNodeMenu(Vector2 position, GenericMenu.MenuFunction2 MenuCallback)
    {
        GenericMenu menu = new GenericMenu();

        var assembly = Assembly.Load(new AssemblyName("Assembly-CSharp"));
        var paramTypes = (from t in assembly.GetTypes() where t.IsSubclassOfRawGeneric(typeof(AParameterNode<>)) && !t.IsAbstract select t).ToArray();
        var flowTypes = (from t in assembly.GetTypes() where t.IsSubclassOfRawGeneric(typeof(AFlowNode)) && !t.IsAbstract select t).ToArray();
        foreach(System.Type t in paramTypes) {
            menu.AddItem(new GUIContent(string.Format("Parameter Nodes/{0}", t.Name)), false, MenuCallback, new NodeCallbackData(position, t));
        }
        foreach(System.Type t in flowTypes) {
            menu.AddItem(new GUIContent(string.Format("Flow Nodes/{0}", t.Name)), false, MenuCallback, new NodeCallbackData(position, t));
        }
        menu.AddItem(new GUIContent("TaskNode"), false, MenuCallback, new NodeCallbackData(position, typeof(TaskNode)));
        menu.AddItem(new GUIContent("TreeNode"), false, MenuCallback, new NodeCallbackData(position, typeof(TreeNode)));
        menu.ShowAsContext();
    }

    private void InputHandler()
    {
        if (_target == null)
        {
            return;
        }
        int   controlID = GUIUtility.GetControlID(new GUIContent("grid view"), FocusType.Passive);
        Event current   = Event.current;
        Rect  r         = new Rect(0f, 0f, _currentViewWidth + 1f, position.height);

        if ((current.type == EventType.MouseDown || current.type == EventType.MouseUp))
        {
            Selection.activeObject = _target;
            if (r.Contains(current.mousePosition))
            {
                return;
            }
        }
        if (current.button == 1 && current.type == EventType.MouseDown && _target != null)
        {
            NodeFactory.CreateNodeMenu(current.mousePosition, MenuCallback);
            current.Use();
            return;
        }
        if (current.button != 2)
        {
            return;
        }
        switch (current.GetTypeForControl(controlID))
        {
        case EventType.MouseDown:
            GUIUtility.hotControl = controlID;
            current.Use();
            EditorGUIUtility.SetWantsMouseJumping(1);
            break;

        case EventType.MouseUp:
            if (GUIUtility.hotControl == controlID)
            {
                GUIUtility.hotControl = 0;
                current.Use();
                EditorGUIUtility.SetWantsMouseJumping(0);
            }
            break;

        case EventType.MouseMove:
        case EventType.MouseDrag:
            if (GUIUtility.hotControl == controlID)
            {
                if (_treeDrawer != null)
                {
                    _treeDrawer.OffsetNodes(current.delta);
                }
                current.Use();
            }
            break;
        }
    }