text: class baseModel {
      constructor(data) {
          this.data = data;
      }
  }
  
  class SuccessModel extends baseModel {
      constructor(data) {
          super(data)
          this.code = 0;
      }
  }
  
  class FailModel extends baseModel {
      constructor(data) {
          super(data);
          this.code = -1;
      }
  }
  
  module.exports = {
      SuccessModel, 
      FailModel
  }