import { Observable } from '../core/Observable';
import { ArrayValues, Subscribable } from '../core/types.h';
import { ExtractInnerTypes } from '../helpers/types/extractInnnerTypes';
export declare function concat<TS extends Array<Subscribable<any>>>(...args: TS): <T>(stream: Subscribable<T>) => Observable<ArrayValues<ExtractInnerTypes<TS>> | T>;