import { IterableX } from '../../iterable/iterablex';
export declare function scanProto<T, R = T>(this: IterableX<T>, accumulator: (previousValue: R, currentValue: T, currentIndex: number) => R, seed?: never[]): IterableX<R>;
export declare function scanProto<T, R = T>(this: IterableX<T>, accumulator: (previousValue: R, currentValue: T, currentIndex: number) => R, seed?: R): IterableX<R>;
declare module '../../iterable/iterablex' {
    interface IterableX<T> {
        scan: typeof scanProto;
    }
}