### 3.2.102 spaceable-grob-interface

A layout object that takes part in the spacing problem.

#### User settable properties:

> `allow-loose-spacing` (boolean)

>   If set, column can be detached from main spacing.

> `keep-inside-line` (boolean)

>   If set, this column cannot have objects sticking into the margin.

> `measure-length` (moment)

>   Length of a measure. Used in some spacing situations.

#### Internal properties:

> `ideal-distances` (list)

>   `(obj . (dist . strength))` pairs.

> `left-neighbor` (graphical (layout) object)

>   The right-most column that has a spacing-wish for this column.

> `minimum-distances` (list)

>   A list of rods that have the format `(obj . dist)`.

> `right-neighbor` (graphical (layout) object)

>   See `left-neighbor`.

> `spacing-wishes` (array of grobs)

>   An array of note spacing or staff spacing objects.

This grob interface is used in the following graphical object(s): NonMusicalPaperColumn and PaperColumn.

#### Internals Reference v2.18.2 (稳定分支).