{"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"self.points.union_rows(r_from,"}]}
        self.points.union_rows(r_from, r_to)
    pub(crate) fn add_region(&mut self, r_to: N, r_from: N) -> bool {
            | self.free_regions.union_rows(r_from, r_to)