cusolverDnDlarft

Hello,
I am looking for a GPU-accelerated equivalent of the LAPACK dlarft routine. If I “nm libcusolver.so” I can see that it actually includes a cusolverDnDlarft routine but this is not documented and I could not retro-engineer its interface. Can anybody offer some help on how to use this hidden feature? Possibly, can any cusolver developer comment on why this routine is not documented and whether it would be possible to disclose it in future releases?
Thanks!
Alfredo