def METHOD_NAME() -> int:
    """A helper function for accessing the main port.
    Uses the LSF job ID so all ranks can compute the main port.
    """
    # check for user-specified main port
    if "MASTER_PORT" in os.environ:
        log.debug(f"Using externally specified main port: {os.environ['MASTER_PORT']}")
        return int(os.environ["MASTER_PORT"])
    if "LSB_JOBID" in os.environ:
        port = int(os.environ["LSB_JOBID"])
        # all ports should be in the 10k+ range
        port = port % 1000 + 10000
        log.debug(f"calculated LSF main port: {port}")
        return port
    raise ValueError("Could not find job id in environment variable LSB_JOBID")