Group
官方原文
This class controls the visibility of a set of referenced widgets.
Widgets are referenced by being added to a comma separated list of ids
// 将通过 'app:constraint_referenced_ids' 属性引用的 'id' 进行统一的可见性处理。
<androidx.constraintlayout.widget.Group
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
app:constraint_referenced_ids="id1, id2, id3" />
