TrackOccupancy
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TrackOccupancy =
"exclusive"|"free"
Defined in: packages/project-schema/src/types.ts:106
Whether two Items may occupy the same instant on a Track.
exclusive Tracks reject overlap, which is what makes a single lane readable
as a sequence of cuts. free Tracks permit it, which stacked titles and
layered audio need. Missing means exclusive for a storyline and free
otherwise, so documents written before this field keep their behaviour.