import type ListMetadata from './ListMetadata';
/**
 * @internal
 * Holds the ids for the lists already seen for a specified level
 */
export default interface LevelLists {
    /**
     * The metadata for the lists seen at  this level
     * key: word list id, value: list metadata
     */
    listsMetadata: {
        [key: string]: ListMetadata;
    };
    /** Unique id of the list currently at this level */
    currentUniqueListId: number;
}
/**
 * @internal
 * create an empty LevelLists
 */
export declare function createLevelLists(): LevelLists;