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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def record(self):
        # type: () -> bytes
        '''
        A method to generate the string representing this UDF ICB Tag.

        Parameters:
         None.
        Returns:
         A string representing this UDF ICB Tag.
        '''
        if not self._initialized:
            raise pycdlibexception.PyCdlibInternalError('UDF ICB Tag not initialized')

        return struct.pack(self.FMT, self.prior_num_direct_entries,
                           self.strategy_type, self.strategy_param,
                           self.max_num_entries, 0, self.file_type,
                           self.parent_icb_log_block_num,
                           self.parent_icb_part_ref_num, self.flags)