fix: make NodeTraversor class open for proper subclassing #294
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NodeTraversor was internal while traverse(_:) was open, making subclassing impossible outside the module. This change makes NodeTraversor open to allow proper subclassing and method overriding.
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NodeTraversor was internal while traverse(_:) was open, making subclassing impossible outside the module. This change makes NodeTraversor open to allow proper subclassing and method overriding.
Resolves #293