pub fn extract_node_set(value: &dyn Value) -> Option<&str>Expand description
Try to extract a node_set metadata value from an Arc<dyn Value>.
Checks whether the value is a TaggedMeta and extracts its node_set.
Returns None if the value is not a TaggedMeta or the field is absent.
The generic Tagged<T> is a user-facing wrapper; provenance extraction
in the executor uses TaggedMeta which is type-erased.