private function addAutocompleteFields(Fieldset $fieldset)
    {
        $fieldset->addField(
            'is_displayed_in_autocomplete',
            'select',
            [
                'name'   => 'is_displayed_in_autocomplete',
                'label'  => __('Display in autocomplete'),
                'values' => $this->booleanSource->toOptionArray(),
            ],
            'is_used_in_spellcheck'
        );

        return $this;
    }