Disable all buttons inside ViewGroup with data binding

layout.xml

<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="@dimen/guideline"
    app:disableButtons="@{vm.busy}">

  <com.google.android.material.button.MaterialButton
      android:id="@+id/saveButton"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginStart="@dimen/guideline"
      android:enabled="@{vm.canSave}"
      android:onClick="@{() -> vm.saveCurrentOrder()}"
      android:text="@string/save"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintLeft_toRightOf="@id/closeButton" />

  <com.google.android.material.button.MaterialButton
      android:id="@+id/checkButton"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginStart="@dimen/guideline"
      android:enabled="@{vm.canCheck}"
      android:onClick="@{() -> vm.checkCurrentOrder()}"
      android:text="@string/check"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintLeft_toRightOf="@id/saveButton" />

</androidx.constraintlayout.widget.ConstraintLayout>

ViewGroupBindingAdapters.kt

import android.view.ViewGroup
import android.widget.Button
import androidx.core.view.children
import androidx.databinding.BindingAdapter

@BindingAdapter("disableButtons")
fun ViewGroup.setDisableButtons(disableButtons: Boolean) {
    children.forEach {
        (it as? Button)?.isEnabled = !disableButtons
    }
}