bracketed silence

[luis jure]

hello list,

i'd need to place brackets around a rest in the score. something like
\parenthesize but square brackets [ ].

i tried using a \markup, but no matter what i try, i found no way to
place the brackets in the staff around the rest. i tried every tweak i
could find in the manual, but it seems to me that lilypond is always
smarter and refuses to place the markup _in_ the staff.

could anyone help me with this? is it at all possible?

best,

lj