Separate voices each on a separate RhythmicStaff

[Ben Finney]

Howdy all,

My reading of the notation reference suggests that LilyPond can
automatically place separate voices onto separate staves, by pitching
those voices differently.

How can this be done for separate rhythm voices? I want separate voices
(sometimes three or more) to appear on a separate RhythmStaff each.

-- 
 \       “Yesterday I told a chicken to cross the road. It said, ‘What |
  `\                                             for?’” —Steven Wright |
_o__)                                                                  |
Ben Finney