import type { AssignmentRoleHint, BookingDraftTraveler, PricingAssignmentUnit } from "./types.js";
/**
 * Inventory units are finite containers a traveler is placed into.
 * Rooms (hotels), vehicles (transfers), seats (where modeled
 * explicitly). Distinct from pricing tiers (`person`).
 */
export declare function optionKey(unit: PricingAssignmentUnit): string;
export declare function isPersonUnit(unit: PricingAssignmentUnit): boolean;
export declare function isInventoryUnit(unit: PricingAssignmentUnit): boolean;
export declare function roleHintForTraveler(traveler: BookingDraftTraveler): AssignmentRoleHint | null;