code: def revert_timefactor(cls, values):
          
          if cls.TIME is True:
              return values / cls.get_timefactor()
          if cls.TIME is False:
              return values * cls.get_timefactor()
          return values
docs: The inverse version of method |Parameter.apply_timefactor|.
  
          See the explanations on method Parameter.apply_timefactor| to
          understand the following examples:
  
          .. testsetup::
  
              >>> from hydpy import pub
              >>> del pub.timegrids
  
          >>> from hydpy.core.parametertools import Parameter
          >>> class Par(Parameter):
          ...     TIME = None
          >>> Par.parameterstep = '1d'
          >>> Par.simulationstep = '6h'
          >>> Par.revert_timefactor(4.0)
          4.0
  
          >>> Par.TIME = True
          >>> Par.revert_timefactor(4.0)
          16.0
  
          >>> Par.TIME = False
          >>> Par.revert_timefactor(4.0)
          1.0