How do we add generic class as Map value ? I am defining class named

abstract class CardHolder<T:RecyclerView.ViewHolder>{

    lateinit var actionListener: CardActionListener

    abstract fun onCreateViewHolder(parent: ViewGroup): T

    abstract fun onBindViewHolder(holder:T, card: Card, position: Int)
}

which will be extended to do inflationa and other formalities to display data,

class NewCardDelegate:CardViewHolder<NewHolder>{
	//Rest of code
}

the reason I was doing this so that I could define a mutableMap<Int,CardHolder> and reduce the Adapter class

val map =mutableMapOf<Int,CardHolder>
map[25] = NewCard() //error

but it seems like its not right way Please guide me for any other better way

You need

CardHolder<*>

as the map value type.

ooh what is this term called @karelpeeters