code: def forecast_names(self):
          
          if "forecasts" in self.pestpp_options.keys():
              return self.pestpp_options["forecasts"].lower().split(',')
          elif "predictions" in self.pestpp_options.keys():
              return self.pestpp_options["predictions"].lower().split(',')
          else:
              return None
docs: get the forecast names from the pestpp options (if any).
          Returns None if no forecasts are named
  
          Returns
          -------
          forecast_names : list
              a list of forecast names.