export declare type TrackedPromise = PromiseLike<any>;
export declare class PromiseTracker {
    private waitIndex;
    private promises;
    track(promise: PromiseLike<any>): void;
    middleware(): () => (next: (action: any) => any) => (action: any) => any;
    hasWork(): boolean;
    waitForCompletion(): Promise<any>;
}