如何在kotlin中使用带有片段的数据绑定？

android {
    ...
    dataBinding {
        enabled = true
    }
}

<layout xmlns:android="http://schemas.android.com/apk/res/android">
    <data>
        <variable
            name="viewModel"
            type="com.example.ViewModel" />
    </data>
    
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@{viewModel.text}" />
        
        <fragment
            android:id="@+id/myFragment"
            android:name="com.example.MyFragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            app:myData="@{viewModel.data}" />
        
    </LinearLayout>
</layout>

class ViewModel {
    val text: String = "Hello World"
    val data: String = "Fragment Data"
}

class MyFragment : Fragment() {
    private var myData: String? = null
    
    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        val binding: FragmentMyBinding = DataBindingUtil.inflate(inflater, R.layout.fragment_my, container, false)
        binding.myData = myData
        return binding.root
    }
    
    fun setMyData(data: String) {
        myData = data
    }
}

class MainActivity : AppCompatActivity() {
    private lateinit var binding: ActivityMainBinding
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
        
        val viewModel = ViewModel()
        binding.viewModel = viewModel
        
        val myFragment = MyFragment()
        myFragment.setMyData(viewModel.data)
        supportFragmentManager.beginTransaction().replace(R.id.myFragment, myFragment).commit()
    }
}