code: def _map(self, event):
      
      description = event.get('description', '')
      start_time = google_base.parse_rfc3339_utc_string(
          event.get('timestamp', ''))
  
      for name, regex in _EVENT_REGEX_MAP.items():
        match = regex.match(description)
        if match:
          return {'name': name, 'start-time': start_time}, match
  
      return {'name': description, 'start-time': start_time}, None
docs: Extract elements from an operation event and map to a named event.