import { Observable } from "rxjs";
/**
 * A React hook that creates a subscription to the provided observable once the
 * component mounts and it unsubscribes when the component unmounts.
 *
 * @param source$ Source observable that the hook will subscribe to.
 * @returns void
 *
 * @remarks This hook doesn't trigger any updates.
 */
export declare const useSubscribe: <T>(source$: Observable<T>) => void;