{"ast_node_type":"variable","tokens":[{"end":59,"kind":"keyword","start":0,"text":"let"}]}
        let tail = block.tail_expr().and_then(|e| match e {
        block.statements().for_each(|s| self.collect_stmt(&mut statements, s));
            ast::Expr::MacroExpr(mac) => self.collect_macro_as_stmt(&mut statements, mac),