code: def update(self) -> None:
          
          indexarray = hydpy.pub.indexer.timeofyear
          self.shape = indexarray.shape
          self.values = indexarray
docs: Reference the actual |Indexer.timeofyear| array of the
          |Indexer| object available in module |pub|.
  
          >>> from hydpy import pub
          >>> pub.timegrids = '27.02.2004', '3.03.2004', '1d'
          >>> from hydpy.core.parametertools import TOYParameter
          >>> toyparameter = TOYParameter(None)
          >>> toyparameter.update()
          >>> toyparameter
          toyparameter(57, 58, 59, 60, 61)