/**
 * this is copied from
 * @link https://github.com/aheckmann/mquery/blob/master/lib/utils.js
 */
/**
 * Merges 'from' into 'to' without overwriting existing properties.
 */
export declare function merge(to: any, from: any): any;
/**
 * Determines if `arg` is an object.
 */
export declare function isObject(arg: Object | any[] | String | Function | RegExp | any): boolean;