syntax_data: {"ast_node_type":"variable","tokens":[{"end":52,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let num = Tree::number(8).prune(&|_| false);
context_before:     fn bench_transmute(b: &mut Bencher) {
context_after:         let dfa = black_box(Dfa::from_tree(num).unwrap());