syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"self.with_lint_level(arm.lint_level,"}]}
source_snippet:         self.with_lint_level(arm.lint_level, |this| {
context_before:     fn visit_arm(&mut self, arm: &'p Arm<'tcx>) {
context_after:             if let Some(expr) = arm.guard {