HarmonyOS Jsons解析的对象无法调用防范

import { plainToInstance } from 'class-transformer' 
 
class Test { 
 md: number = 0 
 
 test() { 
  this.md++ 
  console.log(this.md.toString()) 
 } 
} 
 
let jsonString: string = JSON.stringify({md: 3}) 
let testObject: Test = JSON.parse(jsonString) as Test 
let realTest: Test = plainToInstance(Test, testObject) 
// 可以调用 
realTest.test() 
console.log("")