So inside my hook function I have URI of some file and I need to find it's S3 path (using s3fs module). How can I do that, to avoid manual string manipulation? Is there some helper function?
I found convertUriToKeyedPath() of S3fsStream class but it's protected and also it says "Converts a Drupal URI path into what is expected to be stored in S3" and that "expect is potentially dangerous.