{"ast_node_type":"variable","tokens":[{"end":94,"kind":"keyword","start":0,"text":"let"}]}
            let can_reach_non_diverging = graph::depth_first_search(&coercion_graph, root_vid)
            let root_vid = self.root_var(diverging_vid);
                .any(|n| roots_reachable_from_non_diverging.visited(n));