{"ast_node_type":"function","tokens":[{"end":62,"kind":"keyword","start":0,"text":"do_check(r#\"fn"}]}
        do_check(r#"fn foo<T>() where T: $0Copy"#, &["Copy"]);
        );
        do_check(r#"fn foo<T>() where T: $0Copy + Display"#, &["Copy", "Copy + "]);