unloads all functions that have been loaded from a Wolfram Library, then it unloads the library.
- LibraryUnload unloads all LibraryFunction objects from lib so that they can no longer be used.
- On certain platforms, when all functions from a library have been unloaded, the library can be modified and reloaded.
- LibraryUnload will unload a library that does not follow the Wolfram Library specification.
- When a Wolfram Library is unloaded, an uninitialization function in the library is called.
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