Repeats in \parallelMusic

[David Sumbler]

Is there a way of using "\repeat volta 2" and similar when using
the \parallelMusic command?  The following does not work:


\version "2.18.0"

\parallelMusic #'(Vone Vtwo) {
%bar 1
    \repeat volta 2 { d''1 |
    \repeat volta 2 { f'1 |
%bar 2    
    c''1 } |
    e'1 } |
}

\score { <<
    \new Staff { \Vone }
    \new Staff { \Vtwo }
    >> }


I have tried repositioning the braces but none of my experiments so far
have produced the desired result.

David