The function used to determine the size of pointers.
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@property(nonnull) NSUInteger (*sizeFunction)(const void *item);
This function is used for copy-in operations (unless the collection has an object personality).
The hash function.
The function used to compare pointers.
The function used to describe elements.
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.