Where is the "registeredSpriteAtlasTags" In Preview 4?

In Preveiw 3 ,there is a "registeredSpriteAtlasTags" property in Sprite which can solve my problem.See https://forum.unity3d.com/threads/access-runtimespriteatlas-from-sprite.427674/
But I can't found it or in Preview4 and Unity 2017 beta7,It looks like Unity2017 will ship the final 2D Atals release.Is this property removed forever? I really need it.

 

Currently that has been removed. Could you provide more details how you were using it? I read the post you linked, maybe a bit more detail in the process would help us understand the usefulness.

 

I wrote a demo to explain why I need atlas infomation (tag or reference) from a sprite,check out the attached file and run test scene.

The key code :

Code (CSharp):

1. void LocalizedSpriteRenderer(SpriteRenderer sptRenderer, Language language) {
2.         string atlasName;
3.         //solution 1 : get atlasName from a custom record :(
4.         atlasName = sptRenderer.GetComponent<CustomAtlasRecord>().SpriteTag;
5.         //if we have a property like Sprite.tags,I will not need a CustomRecord :)
6.         //atlasName=sptRenderer.sprite.tags[0];//most sprite only have one tag
7.  
8.         //make atlasName to localized AtlasName
9.         var localizedAtlasName = language + "/" + atlasName;
10.         //load atlas from Resources
11.         var localizedAtlas = Resources.Load<SpriteAtlas>(localizedAtlasName);
12.  
13.         //get correspond sprite
14.         string currentlySpriteName = sptRenderer.sprite.name;
15.         sptRenderer.sprite = localizedAtlas.GetSprite(currentlySpriteName);
16.         sptRenderer.sprite.name = currentlySpriteName;//... why a sprite get from atlas called xxx(clone) :(
17.     }

BTW: Where is the " Runtime swap atlases and automatically rebind with loaded sprite renderers " feature ,the roadmap show it ,but can't found.