HarmonyOS Object.assign(target, source)报错

function assign(target: Record<string, Object>, …source: Object[]): Record<string, Object> { 
  for (const items of source) { 
  for (const key of Object.keys(items)) { 
  target[key] = Reflect.get(items, key) 
} 
} 
return target; 
}

export class ObjectUtils { 
  /** 
   *对象合并 
   *@param target 目标对象 
   *@param source 源对象 
   *@return 合并后的对象 
   **/ 
  static assign(target: Object, source?: Object): Object{ 
    return Object.assign(target, source); 
  }