code: def _GetMessage(self, message_file_key, lcid, message_identifier):
      
      table_name = 'message_table_{0:d}_0x{1:08x}'.format(message_file_key, lcid)
  
      has_table = self._database_file.HasTable(table_name)
      if not has_table:
        return None
  
      column_names = ['message_string']
      condition = 'message_identifier == "0x{0:08x}"'.format(message_identifier)
  
      values = list(self._database_file.GetValues(
          [table_name], column_names, condition))
  
      number_of_values = len(values)
      if number_of_values == 0:
        return None
  
      if number_of_values == 1:
        return values[0]['message_string']
  
      raise RuntimeError('More than one value found in database.')
docs: Retrieves a specific message from a specific message table.
  
      Args:
        message_file_key (int): message file key.
        lcid (int): language code identifier (LCID).
        message_identifier (int): message identifier.
  
      Returns:
        str: message string or None if not available.
  
      Raises:
        RuntimeError: if more than one value is found in the database.