syntax_data: {"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"assert_eq!(debruijn1,"}]}
source_snippet:             assert_eq!(debruijn1, ty::INNERMOST);
context_before:         if let ty::ReBound(debruijn1, br) = region.kind() {
context_after:             ty::Region::new_bound(self.tcx, self.current_index, br)