import { AgoraObservable } from '../../imports';
import { AgoraRtcClient } from '../rtc';
import { AgoraRteObservableTrack } from './type';
export declare abstract class AgoraRteBaseTrack<T> implements AgoraRteObservableTrack<T> {
    protected _rtcClient: AgoraRtcClient;
    protected trackObservable: AgoraObservable<T>;
    constructor(_rtcClient: AgoraRtcClient);
    addObserver(observer: T): void;
    removeObserver(observer: T): void;
}