WKWebsiteDataStore

@interface WKWebsiteDataStore : NSObject <NSCoding>

/* @abstract Returns the default data store. */
+ (WKWebsiteDataStore *)defaultDataStore;

/** @abstract Returns a new non-persistent data store.
 @discussion If a WKWebView is associated with a non-persistent data store, no data will
 be written to the file system. This is useful for implementing "private browsing" in a web view.
*/
+ (WKWebsiteDataStore *)nonPersistentDataStore;

- (instancetype)init NS_UNAVAILABLE;

/*! @abstract Whether the data store is persistent or not. */
@property (nonatomic, readonly, getter=isPersistent) BOOL persistent;

/*! @abstract Returns a set of all available website data types. */
+ (NSSet<NSString *> *)allWebsiteDataTypes;

/*! @abstract Fetches data records containing the given website data types.
  @param dataTypes The website data types to fetch records for.
  @param completionHandler A block to invoke when the data records have been fetched.
*/
- (void)fetchDataRecordsOfTypes:(NSSet<NSString *> *)dataTypes completionHandler:(void (^)(NSArray<WKWebsiteDataRecord *> *))completionHandler;

/*! @abstract Removes website data of the given types for the given data records.
 @param dataTypes The website data types that should be removed.
 @param dataRecords The website data records to delete website data for.
 @param completionHandler A block to invoke when the website data for the records has been removed.
*/
- (void)removeDataOfTypes:(NSSet<NSString *> *)dataTypes forDataRecords:(NSArray<WKWebsiteDataRecord *> *)dataRecords completionHandler:(void (^)(void))completionHandler;

/*! @abstract Removes all website data of the given types that has been modified since the given date.
 @param dataTypes The website data types that should be removed.
 @param date A date. All website data modified after this date will be removed.
 @param completionHandler A block to invoke when the website data has been removed.
*/
- (void)removeDataOfTypes:(NSSet<NSString *> *)websiteDataTypes modifiedSince:(NSDate *)date completionHandler:(void (^)(void))completionHandler;

@end