RecyclerItem, a abstract item in RecyclerView for https://medium.com/@tonny/recyclerview-2020-when-recyclerview-meets-data-binding-616ca5c2147d

RecyclerItem.kt

import androidx.recyclerview.widget.DiffUtil

interface RecyclerItem {
 val layoutId: Int

 val variableId: Int
 val dataToBind: Any

 val id: Int

 override fun equals(other:Any?): Boolean
  
 companion object {
    
  fun <M: RecyclerItem> diffCallback() 
   = object: DiffUtil.ItemCallback<M>() {

    override fun areItemsTheSame(od:M, nw:M) 
     = od === nw || od.id == nw.id

    override fun areContentsTheSame(od:M, nw:M) 
     = od == nw
  }
 }
}