def station_to_lat_lng(station):
    lat_lng = _load_station_to_lat_lng_index().get(station)
    if lat_lng is None:
        return None, None
    return lat_lng
get the max definition level for the given schema path.
dataset/ETHPy150Open impactlab/eemeter/eemeter/location.py/station_to_lat_lng--crossover with--dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/parquet-python/parquet/schema.py/SchemaHelper.max_definition_level