def __init__(self, user_type, **kwargs):
        self.user_type = user_type
        self.db_type = "frozen<%s>" % user_type.type_name()
        super(UserDefinedType, self).__init__(**kwargs)
:param type user_type: specifies the :class:`~.cqlengine.usertype.UserType` model of the column
dataset/ETHPy150Open datastax/python-driver/cassandra/cqlengine/columns.py/UserDefinedType.__init__