Extension-ConstraintGroup-Click-Listener.kt

//Without Extension
view1.setOnClickListener...
view2.setOnClickListener...
viewN.setOnClickListener...

//With Extension
constraintGroup.setAllOnClickListener {
    
}

//Extension function
fun Group.setAllOnClickListener(listener: (View) -> Unit) {
    referencedIds.forEach { id ->
        rootView.findViewById<View>(id).setOnClickListener(listener)
    }
}