@class EFSQLTableSchema, NSString; @interface MFMailMessageLibrarySetThreadSendersRecipientsConflictResolutionUpgradeStep : NSObject <EDTableUpgradeStep> @property (class, readonly, nonatomic) EFSQLTableSchema *threadSendersTableSchema; @property (class, readonly, nonatomic) EFSQLTableSchema *threadRecipientsTableSchema; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; + (id)_schemaWithThreadsTable:(id)a0; + (int)runWithConnection:(id)a0; @end