syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"Some(\"on\""}]}
source_snippet:             Some("on" | "" | "yes" | "y") | None => TerminalUrl::Yes,
context_before:         *slot = match v {
context_after:             Some("off" | "no" | "n") => TerminalUrl::No,