### 2.2.18 Cluster_spanner_engraver

Engrave a cluster using `Spanner` notation.

Music types accepted:

cluster-note-event

This engraver creates the following layout object(s):

ClusterSpanner and ClusterSpannerBeacon.

`Cluster_spanner_engraver` is part of the following context(s): CueVoice, GregorianTranscriptionVoice, KievanVoice, MensuralVoice, PetrucciVoice, TabVoice, VaticanaVoice and Voice.

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