### 3.2.22 cluster-interface

A graphically drawn musical cluster.

`padding` adds to the vertical extent of the shape (top and bottom).

The property `style` controls the shape of cluster segments. Valid values include `leftsided-stairs`, `rightsided-stairs`, `centered-stairs`, and `ramp`.

#### User settable properties:

> `style` (symbol)

>   This setting determines in what style a grob is typeset. Valid choices depend on the `stencil` callback reading this property.

> `padding` (dimension, in staff space)

>   Add this much extra space between objects that are next to each other.

#### 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): ClusterSpanner.

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