code: def ParseAgeSpecification(cls, age):
      
      try:
        return (0, int(age))
      except (ValueError, TypeError):
        pass
  
      if age == NEWEST_TIME:
        return data_store.DB.NEWEST_TIMESTAMP
      elif age == ALL_TIMES:
        return data_store.DB.ALL_TIMESTAMPS
      elif len(age) == 2:
        start, end = age
  
        return (int(start), int(end))
  
      raise ValueError("Unknown age specification: %s" % age)
docs: Parses an aff4 age and returns a datastore age specification.