unity自定义Scene窗口

 using System.Collections;

    
 using System.Collections.Generic;
    
 using UnityEngine;
    
 using UnityEditor;
    
 using UnityEditor.SceneManagement;
    
 using UnityEngine.SceneManagement;
    
 using UnityEngine.Tilemaps;
    
 using UnityEditor.Experimental;
    
 using System.Reflection;
    
 using System;
    
  
    
 public class SceneViewEx : SceneView
    
 {
    
     [MenuItem("Test/SceneViewEx")]
    
     static void Scene