Anyone NOTICED PaperSpriteAtlas? HOW to use it?

Hey guys, I’m looking for an easy solution of SpriteAtlas or TextureAtlas to optimize my game. I don’t know how this guy can be created. I searched online for that keyword but the weird thing is nobody ever mentioned about it. I did see many people talking about using Paper2D to handle atlas feature, but cannot find any descriptions with details about that…