syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"punycode_string"}]}
source_snippet:         punycode_string = String::from_utf8(punycode_bytes).unwrap();
context_before:         // FIXME(eddyb) avoid rechecking UTF-8 validity.
context_after:         &punycode_string