2.2.18 Collision_engraver
Collect NoteColumns, and as soon as there are two or more, put them in a NoteCollision object.
This engraver creates the following layout object(s):
Collision_engraver is part of the following context(s): DrumStaff, GregorianTranscriptionStaff, MensuralStaff, Staff, TabStaff and VaticanaStaff.