keep track of the state in the `Part_combine_engraver`
Originally created by: nez...@gmail.com
Originally owned by: reinhold...@gmail.com
http://codereview.appspot.com/3334043/
Original URL: https://sourceforge.net/p/testlilyissues/issues/1435
Originally created by: nez...@gmail.com
Originally owned by: reinhold...@gmail.com
http://codereview.appspot.com/3334043/
Original URL: https://sourceforge.net/p/testlilyissues/issues/1435