code: def fix_config(self, options):
          
          options = super(CrossValidate, self).fix_config(options)
  
          opt = "setup"
          if opt not in options:
              options[opt] = Classifier(classname="weka.classifiers.rules.ZeroR")
          if opt not in self.help:
              self.help[opt] = "The classifier/clusterer to train (Classifier/Clusterer)."
  
          opt = "folds"
          if opt not in options:
              options[opt] = 10
          if opt not in self.help:
              self.help[opt] = "The number of folds for CV (int)."
  
          opt = "seed"
          if opt not in options:
              options[opt] = 1
          if opt not in self.help:
              self.help[opt] = "The seed value for randomizing the data (int)."
  
          opt = "discard_predictions"
          if opt not in options:
              options[opt] = False
          if opt not in self.help:
              self.help[opt] = "Discard classifier predictions to save memory (bool)."
  
          opt = "output"
          if opt not in options:
              options[opt] = None
          if opt not in self.help:
              self.help[opt] = "For capturing the classifier's prediction output (PredictionOutput)."
  
          return options
docs: Fixes the options, if necessary. I.e., it adds all required elements to the dictionary.
  
          :param options: the options to fix
          :type options: dict
          :return: the (potentially) fixed options
          :rtype: dict