context hierachy

[Rune Zedeler]

Is it sane and safe to assume that if given a staff and a note then the staff is
always the third context from bottom - i.e. that we always have
score > ... > staff > voice > thread > the note
and that one always hence can do
note_grob_info.origin_trans_l_->daddy_trans_l_->ancestor_l(2)
to get (back) to the staff containg the note?

?

Otherwise - in an engraver - how is the best way of given a context (i.e. staff)
and a grob_info (arggument to acknowlegde_grob) to decide which of the childen
of the context (i.e. voices) that contains the grob?


-Rune