Per-feature cell counts.
Total, not partial — every public ICellRange.Feature is present, absent features as explicit zeros. A zero is a fact about the range; a missing key would be ambiguous.
The brand is non-enumerable: Object.keys/entries yield exactly the feature keys.
Object.keys
entries
Readonly
For runtime type checking.
Per-feature cell counts.
Remarks
Total, not partial — every public ICellRange.Feature is present, absent features as explicit zeros. A zero is a fact about the range; a missing key would be ambiguous.
The brand is non-enumerable:
Object.keys/entriesyield exactly the feature keys.