def importHelper(self, struct):
        m = StrStrHashMap()
        keysAndValues = struct.get(self.__field)
        for i in range(0, len(keysAndValues), 2):
            m[keysAndValues[i]] = keysAndValues[i+1]
        return m
def test_impl():
            df = pq.read_table('example.parquet').to_pandas()
            return (df.two.unique() == 'foo').sum()