code: def adj_par_groups(self):
          
          adj_pargp = []
          for pargp in self.par_groups:
              ptrans = self.parameter_data.loc[self.parameter_data.pargp==pargp,"partrans"].values
              if "log" in ptrans or "none" in ptrans:
                  adj_pargp.append(pargp)
          return adj_pargp
docs: get the parameter groups with atleast one adjustable parameter
  
          Returns
          -------
          adj_par_groups : list
              a list of parameter groups with  at least one adjustable parameter