/**
 * encode form parameter string from object
 * @param {Object} obj target object
 */
export declare function encodeFormParams(obj: {
    [key: string]: any;
}): string;
/**
 * encode url parameter string from object
 * replace null value to ''
 * @param {Object} obj target object
 */
export declare function encodeUrlParams(urlParams: {
    [key: string]: any;
}): string;