syntax_data: {"ast_node_type":"function","tokens":[{"end":90,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet:     pub(crate) fn parse_number<T: Copy + FromStr>(slot: &mut T, v: Option<&str>) -> bool {
context_before:     /// Use this for any numeric option that has a static default.
context_after:         match v.and_then(|s| s.parse().ok()) {