code: def setup_hfb_pars(self):
          
          if self.m.hfb6 is None:
              self.logger.lraise("couldn't find hfb pak")
          tpl_file,df = pyemu.gw_utils.write_hfb_template(self.m)
  
          self.in_files.append(os.path.split(tpl_file.replace(".tpl",""))[-1])
          self.tpl_files.append(os.path.split(tpl_file)[-1])
          self.par_dfs["hfb"] = df
docs: setup non-mult parameters for hfb (yuck!)