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### Libraries

- `(current-library-collection-paths [path-list])` gets or sets a list of complete directory pathnames for library collections used by `require-library`. See Chapter 15 for more information. When a new list of pathnames is provided to the parameter procedure, it is converted to an immutable list of immutable strings.
- `(current-require-relative-collection [string-list])` gets or sets a non-empty list of collection names (forming a subcollection path) used by `require-relative-library`, or `#f` if there is no current library collection. See Chapter 15 for more information. When a new list of collection names is provided to the parameter procedure, it is converted to an immutable list of immutable strings.