\version "2.2.0"
\header {

    texidoc = "Completion heads are broken across bar lines. This was
intended as a debugging tool, but it can be used to ease music entry.
Completion heads are not fooled by polyphony with a different rhythm.
"

}

\score{ 
	\context Staff \notes \relative c'' << 
	    { c2. c bes2 } \\
	    { c2. a8 g4 f4. g4 f  }
	>>

	\paper {
		\context{
			\VoiceContext
			\remove "Note_heads_engraver"
			\consists "Completion_heads_engraver"
		}
	}
}
