def METHOD_NAME():
    cmd = [astyle_path]
    cmd.append("-n")
    cmd.append(f"--options={def_path}")
    cmd.append("dummy_file")
    stddout_name = astyle_out_path
    for s in source_list:
        cmd[-1] = s
        with open(stddout_name, "a") as stdout:
            res = subprocess.Popen(cmd, stdout=stdout, stderr=subprocess.STDOUT)
            res.wait()
            # res.returncode