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type AnyObject = { [key in string | number]: any };
interface DeepExtendOptions {  skipIfExist?: boolean;}
function isObjectHasKeys(v: unknown): boolean {  if (typeof v !== "object" || Array.isArray(v) || v == null) return false;  return Object.keys(v).length > 0;}
export default function deepExtend<T = AnyObject>(  destination: AnyObject,  source: AnyObject,  options: DeepExtendOptions = {},): T {  for (let property in source) {    if (isObjectHasKeys(source[property])) {      destination[property] = destination[property] || {};      deepExtend(destination[property], source[property], options);    } else {      if (options.skipIfExist === true && destination[property] !== undefined) {        continue;      }
      if (source[property] === undefined) continue;      destination[property] = source[property];    }  }  return destination as T;}