I don't find a way to implement selection from the end by index using SelectFS - maybe it is a bug or maybe it is not supported:
The `uimaFIT` line is how it works in uimaFIT. Below my attempt in doing it using SelectFS. my understanding is that `backwards()` should change the iteration order (so starting at the end of the index instead of at the beginning in this case) and then `get(0)` should get the final token `dew?`. But instead, the statement returns the first token `Rot`.