Type Alias IntervalKeyAt

Shape returned by IntervalKeyColumn.at(i) — the begin / end timestamps plus the row's label (discriminated by labelKind on the column). Numeric labels are finite; string labels come from the dictionary-encoded label column. Same read-only-by-convention note as TimeRangeKeyAt — readonly is compile-time only.

type IntervalKeyAt = {
    begin: number;
    end: number;
    label: string | number;
}