avtivity.kt

val items = ArrayList<BaseModel>()

items.add(Trip().apply {  from = "NewYork";  to = "Chicago"})
items.add(Trip().apply {  from = "London";  to = "Pennsylvania"})
items.add(Progress())

binding.recyclerView.adapter = Adapter(items){ holder, model ->
    when(holder.binding){
       is ItemTripBinding -> holder.binding.item = model as Trip
       is ProgressBinding -> holder.binding.item = model as Progress 
    }
}