import { Observable } from 'rxjs';
declare type Event = {
    type: string;
    payload: unknown;
};
export declare function event<E extends Event>(ob$: Observable<unknown>, type: E['type']): Observable<E>;
export declare function payload<E extends Event>(ob$: Observable<unknown>, type: E['type']): Observable<E["payload"]>;
export declare function isEvent(input: any, type?: string | {
    startsWith: string;
}): boolean;
export {};