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3.2.20 cluster-beacon-interface
A place holder for the cluster spanner to determine the vertical extents of a cluster spanner at this X position.
User settable properties:
positions(pair of numbers)Pair of staff coordinates
(left . right), where both left and right are instaff-spaceunits of the current staff. For slurs, this value selects which slur candidate to use; if extreme positions are requested, the closest one is taken.
This grob interface is used in the following graphical object(s): ClusterSpannerBeacon.
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