\tuplet in \grace

[Dan Eble]

Are tuplet indications on grace notes (M.2 of the example) a feature or a mere 
side effect of the current implementation?  I'm working on some changes that 
happen to make them disappear and I want to understand whether I need to debug 
that.

\new Staff \fixed c' {
  \new Voice { \tuplet 3/2 4 \grace { g8 g g a8 a a } b1 }
  \new Voice { \grace \tuplet 3/2 4 { g8 g g a8 a a } b1 }
}

Thanks,
— 
Dan