def METHOD_NAME(runner):
    """Postprocess results from a runner.
    Fails if a test folder is missing that is mentioned in the runner
    configuration.
    """
    name = runner["name"]
    tests = runner["tests"]
    print(f"Processing: {name} ")
    tags = ["all", "apt", "apama", "docker", "sm", "analytics"]
    files = ""
    for tag in tags:
        if tag in tests:
            folder = f"{name}/PySys/pysys_junit_xml_{tag}"
            if os.path.exists(folder):
                files += f"{name}/PySys/pysys_junit_xml_{tag}/*.xml "
            else:
                raise SystemError("Folder Expected", folder)
    cmd = f"junitparser merge {files} { name }.xml"
    print(cmd)
    subprocess.run(cmd, shell=True, check=True)