import { IterableX } from '../iterablex';
import { OperatorFunction } from '../../interfaces';
export declare class FlatMapIterable<TSource, TResult> extends IterableX<TResult> {
    private _source;
    private _fn;
    constructor(source: Iterable<TSource>, fn: (value: TSource) => Iterable<TResult>);
    [Symbol.iterator](): Generator<TResult, void, unknown>;
}
export declare function flatMap<TSource, TResult>(selector: (value: TSource) => Iterable<TResult>, thisArg?: any): OperatorFunction<TSource, TResult>;