In Android from all listeners you can get a view which called this listener.
e.g. View.OnClickListener::onClick(View v) or CompoundButton.OnCheckedChangeListener::onCheckedChanged(CompoundButton buttonView, boolean isChecked).
It is convenient to use setTag()/getTag(Object) with view.

At the same time it is not possible to get ToggleButtonLayout object from listener to use setTag()/getTag(Object) with the current implementation.

There are two solutions:

1. Change listener callback, e.g.
   onToggledListener: ((layout: ToggleButtonLayout, toggle: Toggle, selected: Boolean) -> Unit)?

2. Allow to get ToggleButtonLayout from Toggle class.