HarmonyOS taskpool参数是状态变量crash

使用taskpool.execute参数是状态变量，就会报错:

Error message:An exception occurred during serialization, taskpool: failed to serialize arguments. 

如果把model改成普通变量就没有问题，但是有些场景没发避免使用状态变量，请问改怎么处理，下面是代码：

@Entry
@Component
struct Index {
  @State model: Model = new Model()

  aboutToAppear(): void {
    taskpool.execute(printArgs, this.model).then((value: Object) => {
      console.info("taskpool result: " + value);
    }).catch((e: BusinessError) => {
      console.error(`taskpool execute: Code: ${e.code}, message: ${e.message}`);
    })
  }

  build() {
  }
}

@Concurrent
function printArgs(message: Object): string {
  return ''
}