JETPACK组成了来自可组合的班级的实例化类

Question

我有以下逻辑类，

class Logic(){
    private val state: MyViewModel = MyViewModel()

    
    @Composable
    fun PublicComposable(){
      Text("My public composable")
    }

    
    fun setSomething(value:String){
      state.setSomething(value)
    }

    fun getSomething(){
      return state.getSomething()
    }
}

我有我的ViewModel，UI不应该可以访问，而仅适用于逻辑类

class MyViewModel():ViewModel(){

    private val _capturedCard: MutableLiveData<String> = MutableLiveData("Intial Value")
    val capturedCard: LiveData<String> = _capturedCard

    fun setSomething(value:String){
      _capturedCard.value = value
    }

    fun getSomething():String{
      return capturedCard.value
    }

}

，然后我的组合可供我称为：

@Composable
fun Content(){
    val myclass = Logic()
    myclass.PublicComposable()

    Text("Updated Value")

    Button(onClick = {myclass.setSomething("New Value")}){
      Text("Set Something")
    }

    Text("${myclass.getSomething()}")

output

Text("Initial Value")

Instead of 

Text("New Value")

我在这里做错了什么，因为我不希望查看模型在Compose App UI上可用，而只能仅在logic（）类中存在。