def METHOD_NAME(variables_to_drop: pd.Index):
    unexpected_drops = variables_to_drop.difference(US_AGGREGATED_EXPECTED_VARIABLES_TO_DROP)
    if not unexpected_drops.empty:
        log = structlog.get_logger()
        log.warn(
            US_AGGREGATED_VARIABLE_DROP_MESSAGE, variable=unexpected_drops.to_list(),
        )