pub fn nested_boundaries(path: &[Segment]) -> Vec<String>Expand description
The nested boundaries along path: the cumulative dotted path of each
Nested level, outermost first.
Object levels extend the running path but contribute no boundary. A pure
function of the path — identical for every document — so it lives here rather
than on FlussoDocument. An empty result (a root or
flattened-object field) means a plain, non-nested sort.