/// <summary>Constructor</summary>
 /// <param name="client">Spotify Sdk Client</param>
 /// <param name="playlistId">Spotify Playlist Id</param>
 public PlaylistPageViewModel(ISpotifySdkClient client, string playlistId) :
     base(client, playlistId)
 {
     // Values
     PlaylistItems = new ListPlaylistItemViewModel(client, playlistId);
     // Command Actions
     client.CommandActions.Track              = (item) => NavigatePage(item);
     client.CommandActions.Album              = (item) => NavigatePage(item);
     client.CommandActions.Artist             = (item) => NavigatePage(item);
     client.CommandActions.Playlist           = (item) => NavigatePage(item);
     client.CommandActions.User               = (item) => NavigatePage(item);
     client.CommandActions.SetPlaylistImage   = (item) => SetPlaylistImage(item);
     client.CommandActions.SetPlaylist        = (item) => SetPlaylist(item);
     client.CommandActions.RemovePlaylistItem = (item) => PlaylistItems.Remove(item);
     ClearPlaylistCommand = new GenericCommand <PlaylistResponse>(ClearPlaylist);
     // Events
     PlaylistItems.ResponseRemoved += (object sender, ResponseRemovedArgs <PlaylistItemResponse> e) =>
     {
         client.PlaylistItemResponseRemovedHandler(Item, e);
     };
     PlaylistItems.ResponseMoved += (object sender, ResponseMovedArgs e) =>
     {
         client.PlaylistItemResponseMovedHandler(Item, e);
     };
 }
        public async Task ListPlaylistItemViewModel_Test(string id)
        {
            // Arrange
            var model = new ListPlaylistItemViewModel(_client, id);

            // Act
            await((ISupportIncrementalLoading)model.Collection).LoadMoreItemsAsync(count);
            // Assert
            Assert.IsTrue(model.Collection.Count > 0);
        }