syntax_data: {"ast_node_type":"function","tokens":[{"end":59,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn partial_cmp(&self, rhs: &Self) -> Option<Ordering> {
context_before: impl PartialOrd for Span {
context_after:         PartialOrd::partial_cmp(&self.data(), &rhs.data())