import { MonoTypeOperatorFunction, Observable, Subscription } from 'rxjs';
import { HttpResponse } from '@angular/common/http';
export declare const DEBOUNCE_TIME = 500;
export declare function safeUnsub(...subscriptions: Subscription[]): void;
export declare const promisify: <T>(observable: Observable<HttpResponse<T>>) => Promise<T>;
export declare const logAndReturnEmpty: (err: any) => Observable<never>;
/**
 * Shares the result of observable for subscribers and unsubscribe from
 * source when there is no subscribers
 */
export declare function shareResult<T>(): MonoTypeOperatorFunction<T>;
export declare const safeObserve: <T>(observable: Observable<T>, catcher?: (err: any) => Observable<T>) => Observable<T>;
export declare const mapBody: <T>(observable: Observable<HttpResponse<T>>) => Observable<T>;