System/Library/PrivateFrameworks/Message.framework

MFMailMimeTextAttachment.h

Download MFMailMimeTextAttachment.h

1. NSObject
2. >
3. MFMessageTextAttachment
4. >
5. MFMimeTextAttachment

@interface MFMailMimeTextAttachment : MFMimeTextAttachment

- (BOOL)shouldDownloadAttachmentOnDisplay;

@end