docs: def get_best_fit_parameters_translated_grouped(self):
          """Returns the parameters as a dictionary of the 'real units' for the best fit."""
          result_dict = dict()
          result_dict['ocv'] = [parameters['ocv'] for parameters in
                                self.best_fit_parameters_translated]
          result_dict['ir'] = [parameters['ir'] for parameters in
                               self.best_fit_parameters_translated]
  
          for i in range(self.circuits):
              result_dict['r' + str(i)] = [parameters['r' + str(i)] for parameters
                                           in self.best_fit_parameters_translated]
              result_dict['c' + str(i)] = [parameters['c' + str(i)] for parameters
                                           in self.best_fit_parameters_translated]
          return result_dict