One item occupies one track; Grid does not invent a span API.
Record 1
Deterministic collection item
Record 2
Deterministic collection item
Record 3
Deterministic collection item
Record 4
Deterministic collection item
Record 5
Deterministic collection item
Record 6
Deterministic collection item
Record 7
Deterministic collection item
Record 8
Deterministic collection item
Record 9
Deterministic collection item