syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet:     pub(crate) const parse_opt_bool: &str = parse_bool;
context_before:         "one of: `y`, `yes`, `on`, `true`, `n`, `no`, `off` or `false`";
context_after:     pub(crate) const parse_string: &str = "a string";