import type { PlayableOutput } from './playable';
import type { TrackMixerPlayable } from './playables';
import type { TrackAsset } from './track';
/**
 * A class that stores track assets and the generated mixer playables and playable outputs.
 * It is used to query the corresponding playable object based on the track asset.
 */
export declare class TrackInstance {
    boundObject: object;
    trackAsset: TrackAsset;
    mixer: TrackMixerPlayable;
    output: PlayableOutput;
    children: TrackInstance[];
    constructor(trackAsset: TrackAsset, mixer: TrackMixerPlayable, output: PlayableOutput);
    addChild(trackInstance: TrackInstance): void;
}