在TornadoFX中，如何使用objectBinding将BigDecimal属性绑定到另一个BigDecimal属性？

import javafx.beans.property.SimpleObjectProperty
import javafx.beans.property.SimpleStringProperty
import tornadofx.*

class MyViewModel : ViewModel() {
    val sourceProperty = SimpleObjectProperty<BigDecimal>()
    val targetProperty = SimpleObjectProperty<BigDecimal>()

    init {
        // 创建一个objectBinding，将sourceProperty绑定到targetProperty
        targetProperty.bind(sourceProperty)
    }
}

class MyView : View() {
    val myViewModel: MyViewModel by inject()

    override val root = vbox {
        val sourceField = textfield()
        val targetField = textfield()

        // 将文本框的值绑定到ViewModel中的属性
        sourceField.textProperty().bindBidirectional(myViewModel.sourceProperty, BigDecimalStringConverter())
        targetField.textProperty().bindBidirectional(myViewModel.targetProperty, BigDecimalStringConverter())
    }
}