New in version 1.1.
Label leaves in expr with prolated leaf duration:
abjad> tuplet = tuplettools.FixedDurationTuplet(Duration(1, 4), "c'8 d'8 e'8")
abjad> leaftools.label_leaves_in_expr_with_prolated_leaf_duration(tuplet)
abjad> f(tuplet)
\times 2/3 {
c'8 _ \markup { \small 1/12 }
d'8 _ \markup { \small 1/12 }
e'8 _ \markup { \small 1/12 }
}
Return none.