TF-145 Implement LoadMoreEmails in ThreadView

model/lib/email/email_filter.dart

@@ -0,0 +1,15 @@
+
+import 'package:equatable/equatable.dart';
+import 'package:jmap_dart_client/jmap/core/filter/filter.dart';
+import 'package:jmap_dart_client/jmap/mail/mailbox/mailbox.dart';
+
+class EmailFilter with EquatableMixin {
+
+  final Filter? filter;
+  final MailboxId? mailboxId;
+
+  EmailFilter({this.filter, this.mailboxId});
+
+  @override
+  List<Object?> get props => [filter, mailboxId];
+}