Modifying an image style should not require updating all past images inserted

The code I meant: https://github.com/xwiki/xwiki-platform/tree/fce841df73dfda5b22e4d19b3bd43e22f74ca1d8/xwiki-platform-core/xwiki-platform-image/xwiki-platform-image-style/xwiki-platform-image-style-api/src/main/java/org/xwiki/image/style/internal/rendering 

From a quick look, it seems to be primarily about moving things between figure and image for captioned images, though. But I guess it could still serve as an example.