Divisi Vocals

[Ed Ardzinski]

I have tried to look up examples of how to have a divisi vocal part, and all the examples seem to have the music definitions in the score block.  In fact, looking at the 2.12 documentation I can't find anything about it.  Looking through the archives I saw something about a potential feature for hiding a complete staff...is that available in 2.12?
 
My code style is to create most of my music definitions in variables, and put the various fragments together in larger parts - eventually my score blaock look something like this (just an example)
 
\score
{
<<
 \new PianoStaff
 <<
  \new Staff {\rh}
  \new Staff {\lh}
 >>
>>
 \layout {\context {}}
}
 
I'd like to be able to keep this code style - it's been really helpful and "clean".  Any pointers to archives and documentation would be appreciated.  Thanks!