{"ast_node_type":"variable","tokens":[{"end":88,"kind":"keyword","start":0,"text":"let"}]}
    let lit = parse.tree().syntax().descendants().find_map(ast::Literal::cast).unwrap();
        ast::SourceFile::parse(r#"const _: &str = { #[attr] "Hello" };"#, parser::Edition::CURRENT);
    assert_eq!(lit.token().text(), r#""Hello""#);