import { MonoTypeOperatorFunction, Observable } from 'rxjs';
export default function groupJoin<T>(rightStream: Observable<any>, leftKeySelector?: (e: any) => any, rightKeySelector?: (e: any) => any, leftElementSelector?: (e: any) => any, rightElementSelector?: (e: any) => any): MonoTypeOperatorFunction<T>;
export declare function groupJoinOnKey<T>(rightStream: Observable<any>, key: string, leftElementSelector?: (e: any) => any, rightElementSelector?: (e: any) => any): MonoTypeOperatorFunction<T>;