\once squashedPosition = 100 ('O_o!)

[Pierre-Luc Gauthier]

Hello there,

Is it possible to \override the squashedPosition e.g. \once ?

\version "2.25.15"

\layout {
  \context {
    \Voice
    \consists "Pitch_squash_engraver"
    %squashedPosition = #0
  }
}
{
  %\improvisationOff
  c'4 c'
  \improvisationOn
  c'
  \once \override Voice.squashedPosition = #4
  c'
  \improvisationOff
  c'
}

The ML archive did not provide much help.
-- 
Pierre-Luc Gauthier