import { Source } from "../_core";
import { Transaction } from "../_tx";
import { EventStream } from "../EventStream";
import { Observable } from "../Observable";
import { MultiSource, MultiSourceNode } from "./_multisource";
export declare function concat<T>(...observables: Array<Observable<T>>): EventStream<T>;
export declare function concatAll<T>(observables: Array<Observable<T>>): EventStream<T>;
export declare class Concat<T> extends MultiSource<T> {
    constructor(sources: Array<Source<T>>);
    mEnd(tx: Transaction, node: MultiSourceNode<T>): void;
}