code: def GET_getitemvalues(self) -> None:
          
          for item in state.getitems:
              for name, value in item.yield_name2value(state.idx1, state.idx2):
                  self._outputs[name] = value
docs: Get the values of all |Variable| objects observed by the
          current |GetItem| objects.
  
          For |GetItem| objects observing time series,
          |HydPyServer.GET_getitemvalues| returns only the values within
          the current simulation period.