export interface ColumnInter {
    field: string;
    [propName: string]: any;
}
export declare class GridUtilService {
    /**
     * 关键字数组分解成含'|'的字符串
     * @param arr 分解的数组
     */
    generateColumnKey(columns: Array<ColumnInter>): string;
    /**
     * 深克隆
     * @param obj 传入需要克隆的对象
     */
    cloneDeep(obj: any): {};
    isEqual(a: any, b: any): boolean;
}