{"ast_node_type":"variable","tokens":[{"end":50,"kind":"keyword","start":0,"text":"if"}]}
                if let Some(of_trait) = of_trait {
            hir::ItemKind::Impl(hir::Impl { of_trait, .. }) => {
                    self.record_late_bound_vars(of_trait.hir_ref_id, Vec::default());