{"ast_node_type":"function","tokens":[{"end":49,"kind":"keyword","start":0,"text":"fn"}]}
    fn nodes(&'a self) -> dot::Nodes<'a, Crate> {
impl<'a> dot::GraphWalk<'a, Crate, Edge<'a>> for DotCrateGraph<'_> {
        self.crates_to_render.keys().copied().collect()