@class MFMutableMessageHeaders, NSArray, MFOutgoingMultipartRelatedContent, MFOutgoingLibraryMessageContent, MFOutgoingRichtextMessageContent; @interface MFOutgoingMessageContent : NSObject @property (retain, nonatomic) MFMutableMessageHeaders *headers; @property (retain, nonatomic) NSArray *placeholders; @property (readonly, nonatomic) MFOutgoingLibraryMessageContent *libraryContent; @property (readonly, nonatomic) MFOutgoingRichtextMessageContent *richtextContent; @property (readonly, nonatomic) MFOutgoingMultipartRelatedContent *multipartContent; - (void)dealloc; - (id)copy; @end