Removes a given key and its associated value from the map table.
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func removeObject(forKey aKey: KeyType?)
The key to remove.
Does nothing if aKey does not exist.
func setObject(ObjectType?, forKey: KeyType?)
Adds a given key-value pair to the map table.
Empties the map table of its entries.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.