import { CesiumWidget } from '@cesium/engine';
declare class Snow {
    private _id;
    private _viewer;
    private _delegate;
    private _enable;
    private _speed;
    private _state;
    private _requestRenderMode;
    constructor(viewer: CesiumWidget);
    get type(): string;
    set enable(enable: boolean);
    get enable(): boolean;
    set speed(speed: number);
    get speed(): number;
    /**
     *
     * @private
     */
    _createPostProcessStage(): void;
    destroy(): void;
}
export default Snow;