code: def record(self):
          # type: () -> bytes
          '''
          A method to generate the string representing this UDF File Set
          Descriptor.
  
          Parameters:
           None.
          Returns:
           A string representing this UDF File Set Descriptor.
          '''
          if not self._initialized:
              raise pycdlibexception.PyCdlibInternalError('UDF File Set Descriptor not initialized')
  
          rec = struct.pack(self.FMT, b'\x00' * 16,
                            self.recording_date.record(), 3, 3, 1, 1,
                            self.file_set_num, 0, self.log_vol_char_set,
                            self.log_vol_ident, self.file_set_char_set,
                            self.file_set_ident, self.copyright_file_ident,
                            self.abstract_file_ident, self.root_dir_icb.record(),
                            self.domain_ident.record(), b'\x00' * 16,
                            b'\x00' * 48)[16:]
          return self.desc_tag.record(rec) + ref record(self):
          # type: () -> bytes
          '''
          A method to generate the string representing this UDF File Set
          Descriptor.
  
          Parameters:
           None.
          Returns:
           A string representing this UDF File Set Descriptor.
          '''
          if not self._initialized:
              raise pycdlibexception.PyCdlibInternalError('UDF File Set Descriptor not initialized')
  
          rec = struct.pack(self.FMT, b'\x00' * 16,
                            self.recording_date.record(), 3, 3, 1, 1,
                            self.file_set_num, 0, self.log_vol_char_set,
                            self.log_vol_ident, self.file_set_char_set,
                            self.file_set_ident, self.copyright_file_ident,
                            self.abstract_file_ident, self.root_dir_icb.record(),
                            self.domain_ident.record(), b'\x00' * 16,
                            b'\x00' * 48)[16:]
          return self.desc_tag.record(rec) + rec
docs: A method to generate the string representing this UDF File Set
          Descriptor.
  
          Parameters:
           None.
          Returns:
           A string representing this UDF File Set Descriptor.