Waits for any pending asynchronous updates to the defaults database and returns; this method is unnecessary and shouldn't be used.
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
YES if the data was saved successfully to disk, otherwise
Creates a user defaults object initialized with the defaults for the specified user account.
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