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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 GetEntries(self, parser_mediator, match=None, **unused_kwargs):
 """Extracts Safari history items. Args: parser_mediator (ParserMediator):
 mediates interactions between parsers and other components, such as storage and dfvfs. match (Optional[dict[str: object]]):
 keys extracted from PLIST_KEYS. """

    format_version = match.get('WebHistoryFileVersion', None)
    if format_version != 1:
      parser_mediator.ProduceExtractionWarning(
          'unsupported Safari history version: {0!s}'.format(format_version))
      return

    if 'WebHistoryDates' not in match:
      return

    for history_entry in match.get('WebHistoryDates', {}):
      last_visited_date = history_entry.get('lastVisitedDate', None)
      if last_visited_date is None:
        parser_mediator.ProduceExtractionWarning('missing last visited date')
        continue

      try:
        # Last visited date is a string containing a floating point value.
        timestamp = float(last_visited_date)
      except (TypeError, ValueError):
        parser_mediator.ProduceExtractionWarning(
            'unable to convert last visited date {0:s}'.format(
                last_visited_date))
        continue

      display_title = history_entry.get('displayTitle', None)

      event_data = SafariHistoryEventData()
      if display_title != event_data.title:
        event_data.display_title = display_title
      event_data.title = history_entry.get('title', None)
      event_data.url = history_entry.get('', None)
      event_data.visit_count = history_entry.get('visitCount', None)
      event_data.was_http_non_get = history_entry.get(
          'lastVisitWasHTTPNonGet', None)

      # Convert the floating point value to an integer.
      # TODO: add support for the fractional part of the floating point value.
      timestamp = int(timestamp)
      date_time = dfdatetime_cocoa_time.CocoaTime(timestamp=timestamp)
      event = time_events.DateTimeValuesEvent(
          date_time, definitions.TIME_DESCRIPTION_LAST_VISITED)
      parser_mediator.ProduceEventWithEventData(event, event_data)