Merging multi-measure rests in a polyphonic part

When using multi-measure rests in a polyphonic staff, the rests will be placed differently depending on the voice they belong to. However they can be printed on the same staff line, using the following setting.

normalPos = \revert MultiMeasureRest.direction

{
  <<
    {
      c''1
      R1
      c''1
      \normalPos
      R1
    }
    \\
    {
      c'1
      R1
      c'1
      \normalPos
      R1
    }
  >>
}

[image of music]

LilyPond snippets v2.25.20 (development-branch).