Increment bar number after cadenza

[ornello]

I have an unmetered measure in my piece like

{ 
  \override Score.BarNumber #'break-visibility = #all-visible
  c1 \cadenzaOn c4 d e f g f e d \cadenzaOff \bar "|" c1 
}

As specified in the documentation, bar numbering is resumed at the end of
the cadenza as if the cadenza were not there. However I would like to
continue with the next bar number after the cadenza (bar number 3 instead of
2).

Does anybody know how to write this?
Thanks for any suggestions.
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