syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"writeln!(f,"}]}
source_snippet:                 writeln!(f, "    {src:?} -> {dst:?} [label=\"{t:?}\"]")?;
context_before:             for (t, dst) in transitions.byte_transitions.iter() {
context_after:             }