{"ast_node_type":"function","tokens":[{"end":37,"kind":"keyword","start":0,"text":"fn"}]}
    fn graph_id(&'a self) -> Id<'a> {
impl<'a> dot::Labeller<'a, Crate, Edge<'a>> for DotCrateGraph<'_> {
        Id::new("rust_analyzer_crate_graph").unwrap()