/**
 * An index lookup needs an exact key, but codes are compared loosely, so a
 * numeric `9` has to reach the stored `"09"`. Non-numeric input passes through
 * and simply misses.
 */
export declare const normalizeCode: (value: string | number, width: number) => string;
/**
 * Groups row positions by key, building the map on first use. Positions rather
 * than rows, so callers can index into the parallel name index too.
 */
export declare const createIndex: <T>(rows: T[], key: (row: T) => string) => (value: string) => number[];