def METHOD_NAME(xlet: List[dict]) -> Optional[Dict[str, List[str]]]:
    """
    Parse airflow xlets for V1
    :param xlet: airflow v2 xlet dict
    :return: dictionary of xlet list or None
    [{'__var': {'tables': ['sample_data.ecommerce_db.shopify.fact_order']},
        '__type': 'dict'}]
    """
    # This branch is for lineage parser op
    if isinstance(xlet, list) and len(xlet) and isinstance(xlet[0], dict):
        xlet_dict = xlet[0]
        # This is how the Serialized DAG is giving us the info from _inlets & _outlets
        if isinstance(xlet_dict, dict) and xlet_dict.get("__var"):
            xlet_dict = xlet_dict["__var"]
        return {
            key: value for key, value in xlet_dict.items() if isinstance(value, list)
        }
    return None