syntax_data: {"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"\"one"}]}
source_snippet:         "one of: `y`, `yes`, `on`, `true`, `n`, `no`, `off` or `false`";
context_before:     pub(crate) const parse_bool: &str =
context_after:     pub(crate) const parse_opt_bool: &str = parse_bool;