import { Observable } from '../Observable';
import { Operator } from '../Operator';
import { Observer } from '../Observer';
import { Subscription } from '../Subscription';
import { OuterSubscriber } from '../OuterSubscriber';
import { Subscribable } from '../Observable';
export declare function mergeAll<T>(this: Observable<T>, concurrent?: number): T;
export declare function mergeAll<T, R>(this: Observable<T>, concurrent?: number): Subscribable<R>;
export declare class MergeAllOperator<T> implements Operator<Observable<T>, T> {
    private concurrent;
    constructor(concurrent: number);
    call(observer: Observer<T>, source: any): any;
}
/**
 * We need this JSDoc comment for affecting ESDoc.
 * @ignore
 * @extends {Ignored}
 */
export declare class MergeAllSubscriber<T> extends OuterSubscriber<Observable<T>, T> {
    private concurrent;
    private hasCompleted;
    private buffer;
    private active;
    constructor(destination: Observer<T>, concurrent: number);
    protected _next(observable: Observable<T>): void;
    protected _complete(): void;
    notifyComplete(innerSub: Subscription): void;
}