Returns the dictionary object associated with the specified key.
- iOS 5.0+
- macOS 10.7+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
A key in the key-value store.
The dictionary object associated with the specified key or
nil if the key was not found or its value is not an
Returns the Boolean value associated with the specified key.
Returns the data object associated with the specified key.
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