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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 ParseGenericRow( self, parser_mediator, query, row, **unused_kwargs):
 """Parses a generic windows timeline row. Args: parser_mediator (ParserMediator):
 mediates interactions between parsers and other components, such as storage and dfvfs. query (str):
 query that created the row. row (sqlite3.Row):
 row. """

    query_hash = hash(query)

    event_data = WindowsTimelineGenericEventData()

    # Payload is JSON serialized as binary data in a BLOB field, with the text
    # encoded as UTF-8.
    payload_json_bytes = bytes(self._GetRowValue(query_hash, row, 'Payload'))
    payload_json_string = payload_json_bytes.decode('utf-8')
    # AppId is JSON stored as unicode text.
    appid_entries_string = self._GetRowValue(query_hash, row, 'AppId')

    payload = json.loads(payload_json_string)
    appid_entries = json.loads(appid_entries_string)

    # Attempt to populate the package_identifier field by checking each of
    # these fields in the AppId JSON.
    package_id_locations = [
        'packageId', 'x_exe_path', 'windows_win32', 'windows_universal',
        'alternateId']
    for location in package_id_locations:
      for entry in appid_entries:
        if entry['platform'] == location and entry['application'] != '':
          event_data.package_identifier = entry['application']
          break
      if event_data.package_identifier is None:
        # package_identifier has been populated and we're done.
        break

    if 'description' in payload:
      event_data.description = payload['description']
    else:
      event_data.description = ''

    if 'appDisplayName' in payload and payload['appDisplayName'] != '':
      event_data.application_display_name = payload['appDisplayName']
    elif 'displayText' in payload and payload['displayText'] != '':
      # Fall back to displayText if appDisplayName isn't available
      event_data.application_display_name = payload['displayText']

    timestamp = self._GetRowValue(query_hash, row, 'StartTime')
    date_time = dfdatetime_posix_time.PosixTime(timestamp=timestamp)
    event = time_events.DateTimeValuesEvent(
        date_time, definitions.TIME_DESCRIPTION_START)
    parser_mediator.ProduceEventWithEventData(event, event_data)