3 Arpeggios are supported, both cross-staff and broken single staff.
11 \context Staff
=one
\notes\relative c''{
12 \context Voice
< fis,-
\arpeggio d a >
13 %%\property PianoStaff.SpanArpeggio \override #'connect = ##t
14 \property PianoStaff
.connectArpeggios
= ##t
17 \context Staff
=two
\notes\relative c{
19 \context Voice
< g b d-
\arpeggio >