/**
 * 深克隆图层配置项
 */
export declare const deepMergeLayerOptions: <O extends {
    source: any;
}>(options: Partial<O>, srcOptions: Partial<O>) => O;
/**
 * 判断 source 数据是否发生改变
 */
export declare const isSourceChanged: <S extends {
    data: any;
} = {
    data: any;
}>(source: S, currentSource: S) => boolean;
