#### Grob_pq_engraver

Administrate when certain grobs (eg. note heads) stop playing; this engraver is a sort-of a failure, since it doesn't handle all sorts of borderline cases very well.

Properties (read)

`busyGrobs` (list)
  a queue of (end-moment . GROB) conses. This is for internal (C++) use only. This property contains the grobs which are still busy (e.g. note heads, spanners, etc.)

Properties (write)

`busyGrobs` (list)
  a queue of (end-moment . GROB) conses. This is for internal (C++) use only. This property contains the grobs which are still busy (e.g. note heads, spanners, etc.)

`Grob_pq_engraver` is part of contexts: DrumVoice, GregorianTranscriptionVoice, TabVoice, VaticanaVoice and Voice

Read comments on this page, or add one. This page is for LilyPond-2.2.5 (stable-branch).