syntax_data: {"ast_node_type":"function","tokens":[{"end":62,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn visit_region(&mut self, r: I::Region) -> Self::Result {
context_before:     // and has no `super_visit_with` method to call.
context_after:         if let ty::ReError(guar) = r.kind() {