recyclerView.getChildAdapterPosition() is annotated as nonNull  #1

I was trying to use the Core package but in PagerSnapHelperVerbose the fun findSnapView uses a
recyclerView.getChildAdapterPosition(view) and in androidX namepsace/packages the view is annotated as NonNull and this causes some problems.
However when i checked out this repository in the support libraries the same fun is not annotated as NonNull.
Do you have any insight on how to fix this issue ?