Hashes the essential components of this value by feeding them into the given hasher.
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func hash(into hasher: inout Hasher)
NSObject implements this by feeding self.hash to the hasher.
NSObject.hash(into:) is not overridable; subclasses can customize hashing by overriding the hash property.
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.