Revert "nnsvls"

This reverts commit 72e801c4c037a81503746516590c92f46c78107c.
Revert "Revert "nnsvls""

This reverts commit 1db2ffaa083b61c1a41699ecec3d3bdb50e94ac4.
Revert "Revert "Revert "nnsvls"""

This reverts commit e7f931df9bf542c76713f2f10f88771f765ac30b.