@protocol IMSyncedSettingsManaging; @interface CKKeepMessagesPreferenceManager : NSObject @property (class, retain) id<IMSyncedSettingsManaging> syncedSettingsManager; + (id)keepMessagesPreference; - (void)dealloc; - (void)_setLegacyKeepMessagesPreference:(id)a0; - (void)addSyncedSettingObserver:(id)a0 selector:(SEL)a1 key:(long long)a2; - (void)removeSyncedSettingObserver:(id)a0 key:(long long)a1; - (void)updateKeepMessagesPreference:(id)a0; @end