/**
 * @typedef {object} UniqueMap
 * @property {Function} addItem Adds a new item to the unique map.
 * @property {Function} clear Clears the map.
 * @property {Function} getId Returns ID for the passed item.
 * @property {Function} getItem Gets item from the passed ID.
 * @property {Function} getItems Gets all items from the map.
 * @property {Function} hasItem Verifies if the passed ID exists in a map.
 * @property {Function} removeItem Removes item from the passed id if exists.
 */
/**
 * Creates a new unique map.
 *
 * @param {object} config The config for priority queue.
 * @param {Function} config.errorIdExists The function to generate custom message if ID is already taken.
 * @returns {UniqueMap}
 */
export declare function createUniqueMap({ errorIdExists }?: {
    errorIdExists?: Function;
}): {
    addItem: (id: unknown, item: unknown) => void;
    clear: () => void;
    getId: (item: unknown) => unknown;
    getItem: (id: unknown) => unknown;
    getItems: () => [unknown, unknown][];
    getValues: () => unknown[];
    hasItem: (id: unknown) => boolean;
    removeItem: (id: unknown) => boolean;
};