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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 GetTimeOfDay(self):
 """Retrieves the time of day represented by the date and time values. Returns: tuple[int, int, int]: hours, minutes, seconds or (None, None, None) if the date and time values do not represent a time of day. """

    normalized_timestamp = self._GetNormalizedTimestamp()
    if normalized_timestamp is None:
      return None, None, None

    _, hours, minutes, seconds = self._GetTimeValues(normalized_timestamp)
    return hours, minutes, seconds