{"ast_node_type":"import","tokens":[{"end":70,"kind":"keyword","start":0,"text":"check_module(\"std::io\","}]}
    check_module("std::io", r"use std::fmt;", r"use std::{fmt, io};");
fn merge_groups() {
    check_one("std::io", r"use {std::fmt};", r"use {std::{fmt, io}};");