New in version 2.3.
Attach stem_tremolos to notes and chords in expr:
abjad> staff = Staff("c'8 d'8 e'8 f'8")
abjad> stem_tremolo = marktools.StemTremolo(16)
abjad> marktools.attach_stem_tremolos_to_notes_and_chords_in_expr(staff, [stem_tremolo])
abjad> f(staff)
\new Staff {
c'8 :16
d'8 :16
e'8 :16
f'8 :16
}
Return none.