Drawing boxes around grobs

[Paolo Prete]

Hello,

The documentation shows this example:

\override TextScript.stencil = #(make-stencil-boxer 0.1 0.3 ly:text-interface::print) c'4^"foo"

(http://lilypond.org/doc/v2.19/Documentation/snippets/tweaks-and-overrides)

Is it possible to adapt it for other grobs too? I would like to use it for TupletBracket, OttavaBracket, Notehead and Script, but it seems that it works for TextScript only

Thanks!

P