def validate_options(namespace):
    """Validate any flattened request header option arguments."""
    try:
        start = namespace.start_range
        end = namespace.end_range
    except AttributeError:
        return
    else:
        namespace.ocp_range = None
        del namespace.start_range
        del namespace.end_range
        if start or end:
            start = start if start else 0
            end = end if end else ''
            namespace.ocp_range = 'bytes={}-{}'.format(start, end)
