LilyPond Internals Reference: 3.2.38 grace-spacing-interface

### 3.2.38 grace-spacing-interface

Keep track of durations in a run of grace notes.

#### User settable properties:

> `common-shortest-duration` (moment)

>   The most common shortest note length. This is used in spacing. Enlarging this sets the score tighter.

#### Internal properties:

> `columns` (array of grobs)

>   An array of grobs, typically containing `PaperColumn` or `NoteColumn` objects.

This grob interface is used in the following graphical object(s): GraceSpacing.

#### Internals Reference