{"ast_node_type":"variable","tokens":[{"end":74,"kind":"keyword","start":0,"text":"let"}]}
    let first_arg_indent = args.args().next().map(|it| it.indent_level());
    let FileRangeWrapper { file_id, range } = ctx.sema.original_range_opt(args.syntax())?;
    let arg_list_indent = args.indent_level();