@class NSString; @interface MFMailMessageLibraryRebuildThreadsTableUpgradeStep : NSObject <EDTableUpgradeStep> @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; + (id)_threadsTableSchemaWithMessagesTable:(id)a0 conversationsTable:(id)a1 threadScopesTable:(id)a2; + (int)runWithConnection:(id)a0; @end