def METHOD_NAME(prefixes_and_configs):
    from sentry.datascrubbing import _merge_pii_configs as f
    prefixes_and_configs_bak = copy.deepcopy(prefixes_and_configs)
    rv = f(prefixes_and_configs)
    # No accidental mutation
    assert prefixes_and_configs == prefixes_and_configs_bak
    return rv