import { MonoTypeOperatorFunction, Observable } from "rxjs";
import { HomieID } from "../model";
import { MQTTConnectOpts } from "../model";
/**
 * Returns an observable that will emit if the device with the given ID has state disconnected/lost or timeout occurs.
 *
 * @param id HomieID of the device to check
 * @param mqttOpts MQTT connection options
 * @param timeout timeout to wait for disconnected/lost state
 * @returns true if device is disconnected or lost, false if timeout occured.
 */
export declare function waitForPreviousControllerDown$(id: HomieID, mqttOpts: MQTTConnectOpts, timeout?: number): Observable<boolean>;
export declare function filterExternal<T, P>(item: T, predicate: (value: T) => Observable<boolean>): MonoTypeOperatorFunction<P>;