ItemsView thing.

Wino.Core/Synchronizers/GmailSynchronizer.cs

@@ -1032,7 +1032,7 @@ public class GmailSynchronizer : WinoSynchronizer<IClientServiceRequest, Message
         return await _gmailChangeProcessor.GetMailCopiesAsync(messageIds);
     }
 
-    public override async Task DownloadMissingMimeMessageAsync(IMailItem mailItem,
+    public override async Task DownloadMissingMimeMessageAsync(MailCopy mailItem,
                                                            ITransferProgress transferProgress = null,
                                                            CancellationToken cancellationToken = default)
     {

Wino.Core/Synchronizers/ImapSynchronizer.cs

@@ -219,7 +219,7 @@ public class ImapSynchronizer : WinoSynchronizer<ImapRequest, ImapMessageCreatio
         }, request, request);
     }
 
-    public override async Task DownloadMissingMimeMessageAsync(IMailItem mailItem,
+    public override async Task DownloadMissingMimeMessageAsync(MailCopy mailItem,
                                                            ITransferProgress transferProgress = null,
                                                            CancellationToken cancellationToken = default)
     {

Wino.Core/Synchronizers/OutlookSynchronizer.cs

@@ -1327,7 +1327,7 @@ public class OutlookSynchronizer : WinoSynchronizer<RequestInformation, Message,
         return Move(batchMoveRequest);
     }
 
-    public override async Task DownloadMissingMimeMessageAsync(IMailItem mailItem,
+    public override async Task DownloadMissingMimeMessageAsync(MailCopy mailItem,
                                                            MailKit.ITransferProgress transferProgress = null,
                                                            CancellationToken cancellationToken = default)
     {

Wino.Core/Synchronizers/WinoSynchronizer.cs

@@ -445,7 +445,7 @@ public abstract class WinoSynchronizer<TBaseRequest, TMessageType, TCalendarEven
     /// <param name="mailItem">Mail item that its mime file does not exist on the disk.</param>
     /// <param name="transferProgress">Optional download progress for IMAP synchronizer.</param>
     /// <param name="cancellationToken">Cancellation token.</param>
-    public virtual Task DownloadMissingMimeMessageAsync(IMailItem mailItem, ITransferProgress transferProgress = null, CancellationToken cancellationToken = default) => throw new NotSupportedException(string.Format(Translator.Exception_UnsupportedSynchronizerOperation, this.GetType()));
+    public virtual Task DownloadMissingMimeMessageAsync(MailCopy mailItem, ITransferProgress transferProgress = null, CancellationToken cancellationToken = default) => throw new NotSupportedException(string.Format(Translator.Exception_UnsupportedSynchronizerOperation, this.GetType()));
 
     /// <summary>
     /// Performs an online search for the given query text in the given folders.