docs: def bound_params_from_dict(bound_param_dict):
      """Define `~lmfit.parameter.Parameters` object from dictionary.
  
      Parameters
      ----------
      bound_param_dict : dictionary
          Dictionary containing the JSON contents of a boundary
          parameter file.
  
      Returns
      -------
      params : :class:`~lmfit.parameter.Parameters`
          Parameters object.
  
      """
  
      params = Parameters()
      for mainpar in EXPECTED_PARAMETER_LIST:
          if mainpar not in bound_param_dict['contents'].keys():
              raise ValueError('Parameter ' + mainpar + ' not found!')
          if bound_param_dict['meta_info']['parmodel'] == "longslit":
              dumdict = bound_param_dict['contents'][mainpar]
              params.add(mainpar, value=dumdict["value"],
                         vary=dumdict["vary"])
          elif bound_param_dict['meta_info']['parmodel'] == 'multislit':
              for subpar in ['a0s', 'a1s', 'a2s']:
                  if subpar not in bound_param_dict['contents'][mainpar].keys():
                      raise ValueError('Subparameter ' + subpar + ' not found' +
                                       ' under parameter ' + mainpar)
                  cpar = mainpar + '_' + subpar
                  dumdict = bound_param_dict['contents'][mainpar][subpar]
                  params.add(cpar, value=dumdict["value"],
                             vary=dumdict["vary"])
          else:
              print('parmodel: ', bound_param_dict['meta_info']['parmodel'])
              raise ValueError('Unexpected parmodel')
      return params