How to get generated texture of sprite atlas in editor from script?

Bump, the only way I found to get the texture is at runtime using

 sprites = new Sprite[unityAtlas.spriteCount];
 unityAtlas.GetSprites(sprites);
 Texture2D spriteAtlasTexture = sprites[0].texture;
 
 //This only works at runtime and if I call it in editor, I get the imported texture and not atlas texture.