--- /dev/null
+\version "2.16.0"
+
+\header {
+texidoc = "
+Note head completion may be broken into sub-bar units by setting the
+@code{completionUnit} property.
+"
+}
+
+\layout {
+ \context {
+ \Voice
+ \remove "Note_heads_engraver"
+ \consists "Completion_heads_engraver"
+ }
+}
+
+\context Staff \relative f {
+ \time 9/8
+ \set completionUnit = #(ly:make-moment 3 8)
+ g'1.. g2
+ \time 6/4
+ \set completionUnit = #(ly:make-moment 1 4)
+ \set tupletSpannerDuration = #(ly:make-moment 1 4)
+ \times 2/3 { e4 c8 f g a4 b8 c4 b8 a4 g8 a e f4 }
+}