{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"self.span_edges[curr].as_ref().unwrap();"}]}
                    self.span_edges[curr].as_ref().unwrap();
                let &SpantreeEdge { is_reversed, claiming_node, span_parent } =
                let op = if is_reversed { Op::Subtract } else { Op::Add };