LilyPond Internals Reference: 2.2.53 Forbid_line_break_engraver

### 2.2.53 `Forbid_line_break_engraver`

Forbid line breaks when note heads are still playing at some point.

Properties (read)

`busyGrobs` (list)

  A queue of `(end-moment . grob)` cons cells. This is for internal (C++) use only. This property contains the grobs which are still busy (e.g., note heads, spanners, etc.).

Properties (write)

`forbidBreak` (boolean)

  If set to `#t`, prevent a line break at this point, except if explicitly requested by the user.

`Forbid_line_break_engraver` is part of the following context(s) in `\layout`: `CueVoice`, `DrumVoice`, `GregorianTranscriptionVoice`, `KievanVoice`, `MensuralVoice`, `PetrucciVoice`, `StandaloneRhythmVoice`, `TabVoice`, `VaticanaVoice` and `Voice`.

#### LilyPond – Internals Reference v2.24.4 (stable-branch).