MovieHunt blog part3.

Listing.kt

data class Listing<T>(
  // the paged list for UI to observer
  val pagedList: Observable<PagedList<T>>,
  // the network request status for pull-to-refresh or first time refresh
  val refreshState: Observable<NetworkState>? = null,
  // the network request state to show load more progress or error
  val loadMoreState: Observable<NetworkState>? = null,
  // refresh the whole data set and fetch it from scratch
  val refresh: () -> Unit = {}
)