{"ast_node_type":"variable","tokens":[{"end":60,"kind":"keyword","start":0,"text":"if"}]}
        if let Some(sub_row) = self.points.row(sub_region) {
    pub(crate) fn contains_points(&self, sup_region: N, sub_region: N) -> bool {
            if let Some(sup_row) = self.points.row(sup_region) {