UPaperSprite: alternatives to WITH_EDITOR methods which would be useful in package?

Hello, after a while of using UPaperSprite from c++, I got to the point of deploying my project to find out most of the methods I was using are marked for editor-only compilation.
The online docs do not state that at all, although it became immediately apparent when I looked at the engine source code.

Now I wonder how I can overcome this situation, it looks like I can manage to get the source texture size with a long roundtrip, but I really got stuck on retrieving the pivot of a sprite.
Suggestions?