syntax_data: {"ast_node_type":"variable","tokens":[{"end":25,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let mut render_opts =
context_before:     let graphviz = Formatter::new(body, analysis, results, style);
context_after:         vec![dot::RenderOption::Fontname(tcx.sess.opts.unstable_opts.graphviz_font.clone())];