@class NSString; @interface SGEmailKey : SGMessageKey <SGEntityKey> @property (readonly) NSString *messageId; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; + (BOOL)isSupportedEntityType:(long long)a0; - (BOOL)isEqual:(id)a0; - (id)initWithSource:(id)a0 messageId:(id)a1; - (id)initWithMailMessageKey:(id)a0; - (BOOL)isEqualToEmailKey:(id)a0; - (id)toMailMessageKey; @end