{"ast_node_type":"variable","tokens":[{"end":71,"kind":"keyword","start":0,"text":"let"}]}
        let old_maybe_typeck_results = self.maybe_typeck_results.get();
    fn nested(&self, state: &mut pprust_hir::State<'_>, nested: pprust_hir::Nested) {
        if let pprust_hir::Nested::Body(id) = nested {