@interface MFUserDefaultMigrator : NSObject + (id)log; + (id)_keysToMigrateToSharedAppGroup; + (void)_migrateExtPropertiesPlist; + (id)currentDeviceIdentifer; + (void)migrateDefaults:(id)a0; + (void)migrateDefaultsFromOldKeysToNewKeys:(id)a0; + (BOOL)migratePreferencesToSharedAppGroup; + (void)migratePropertyForOldKey:(id)a0 newKey:(id)a1; + (id)mobileMailDefaultForKey:(id)a0; + (id)oldKeysToNewKeysMap; + (void)removeMobileMailDefaultForKey:(id)a0; @end