export declare function at(iterator: any, index: number): string;
export declare function filter(iterator: any, predicate: Function): any[];
export declare function find(iterator: any, predicate: Function): string;
export declare function findIndex(iterator: any, predicate: Function): number;
export declare function from(set: Set<any>): IterableIterator<any>;
export declare function includes(iterator: any, targetElement: any, fromIndex?: number): boolean;
export declare function last(iterator: any): any;
export declare function map(iterator: any, predicate: Function): any[];
export declare function reduce(iterator: any, predicate: Function, initialValue: any): any;
declare const _default: {
    at: typeof at;
    filter: typeof filter;
    find: typeof find;
    findIndex: typeof findIndex;
    from: typeof from;
    includes: typeof includes;
    last: typeof last;
    map: typeof map;
    reduce: typeof reduce;
};
export default _default;