CreateViewHolder.kt

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BaseHolder {
    val inflater = LayoutInflater.from(parent.context)
    val itemView: View
    val dataHolder: BaseHolder = when(viewType) {
        Type.NORMAL.value -> {
            itemView  = inflater.inflate(normalCellLayout, parent, false)
            NormalGoodHolder(itemView, callback)
        }
        Type.SALE.value -> {
            itemView  = inflater.inflate(saleCellLayout, parent, false)
            SaleGoodHolder(itemView, callback)
        }
        else -> {
            throw IllegalStateException("Something went horribly wrong")
        }
    }
    return dataHolder
}