System/Library/PrivateFrameworks/Message.framework

Message.MessagesBeingDownloaded.h

Download Message.MessagesBeingDownloaded.h

1. _TtCs12_SwiftObject

@interface Message.MessagesBeingDownloaded : _TtCs12_SwiftObject {
    void /* unknown type, empty encoding */ elements;
    void /* unknown type, empty encoding */ pendingHeaders;
}

@end