how to display Arpeggio in TabStaff in 2.17?

[Federico Bruni]

I used to display the Arpeggio in TabStaff this way:
\revert Arpeggio #'stencil

I know that David made a big change in the code and the synthax is 
changed, but I can't make it work.

\revert Arpeggio.stencil

doesn't work.
What's wrong?

See snippet below.
Thanks,
Federico


%\version "2.16.1"
\version "2.17.9"

music =  \relative c {
  <c e g c>4\arpeggio
}

\score {
  \new StaffGroup <<
    \new Staff <<
      \context Voice { \clef "G_8" \music }
    >>
    \new TabStaff  <<
      \context TabVoice { \clef "moderntab" \music }
    >>
  >>
  \layout {
    \context {
      % Display arpeggio in TabStaff
      \TabStaff
      % old command for 2.16:
      % \revert Arpeggio #'stencil

      % TODO: different command for 2.17 needed!
      \revert Arpeggio.stencil
    }
  }
}