syntax_data: {"ast_node_type":"other","tokens":[{"end":23,"kind":"keyword","start":0,"text":"Ok(match"}]}
source_snippet:         Ok(match *pat {
context_before:     fn print_pat(&mut self, pat: ty::Pattern<'tcx>) -> Result<(), std::fmt::Error> {
context_after:             ty::PatternKind::Range { start, end } => {