def METHOD_NAME(m, base="TDS"):
    if base == "TDS":
        prop = m.fs.prop_TDS
    elif base == "ion":
        prop = m.fs.prop_ion
    elif base == "salt":
        prop = m.fs.prop_salt
    elif base == "eNRTL":
        prop = m.fs.prop_eNRTL
    else:
        raise ValueError(
            "Unexpected property base {base} for get_prop" "".format(base=base)
        )
    return prop