{"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"assert_eq!(t1.token_trees.len(),"}]}
        assert_eq!(t1.token_trees.len(), 2);
        let t1 = TokenStream::from_str("(a)", TokenId(0)).unwrap();
        assert!(t1.token_trees[0..2] == subtree_paren_a);