How to use the gekko.gk_operators.GK_Intermediate function in gekko

d1 = var_dict.copy()
                    d1['name'] = var + '_hist(bias)'
                    self.gekko_data['vars']['variables'].append(d1)
                    d2 = var_dict.copy()
                    d2['name'] = var + '_hist(nobias)'
                    self.gekko_data['vars']['variables'].append(d2)
                    d3 = var_dict.copy()
                    d3['name'] = var + '(nobias)'
                    self.gekko_data['vars']['variables'].append(d3)
            elif isinstance(main_dict[var], GKParameter):
                self.gekko_data['vars']['parameters'].append(var_dict)
                if isinstance(main_dict[var], (GK_MV, GK_FV)):
                    d = var_dict.copy()
                    d['name'] = var + '_hist'
                    self.gekko_data['vars']['parameters'].append(d)
            elif isinstance(main_dict[var], GK_Intermediate):
                self.gekko_data['vars']['intermediates'].append(var_dict)

        # Update the variable if the data has been loaded before
        data = False
        if isinstance(main_dict[var], GKVariable):
            self.get_variable_fron_main(var)
            return
        elif isinstance(main_dict[var], GKParameter):
            self.get_parameter_from_main(var)
            return
        elif isinstance(main_dict[var], GK_Intermediate):
            data = list(filter(lambda d: d['name'] == var, self.gekko_data['vars']['intermediates']))[0]
        try:
            data['data'] = data['data'] + [self.results[main_dict[var].name][0]]
            data['options'] = self.options[main_dict[var].name]

def Intermediate(self,equation,name=None):
        if name is not None:
            name = re.sub(r'\W+', '_', name).lower()
            if name == '':
                name = None
        inter = GK_Intermediate(name)
        self._intermediates.append(inter)
        self._inter_equations.append(str(equation))
        return inter

if isinstance(main_dict[var], (GK_MV, GK_FV)):
                    d = var_dict.copy()
                    d['name'] = var + '_hist'
                    self.gekko_data['vars']['parameters'].append(d)
            elif isinstance(main_dict[var], GK_Intermediate):
                self.gekko_data['vars']['intermediates'].append(var_dict)

        # Update the variable if the data has been loaded before
        data = False
        if isinstance(main_dict[var], GKVariable):
            self.get_variable_fron_main(var)
            return
        elif isinstance(main_dict[var], GKParameter):
            self.get_parameter_from_main(var)
            return
        elif isinstance(main_dict[var], GK_Intermediate):
            data = list(filter(lambda d: d['name'] == var, self.gekko_data['vars']['intermediates']))[0]
        try:
            data['data'] = data['data'] + [self.results[main_dict[var].name][0]]
            data['options'] = self.options[main_dict[var].name]

        except KeyError:
            # Some vars are not in options.json and so do not make it into self.options
            # This case should be safe to ignore
            pass
        except Exception as e:
            raise e