odoo16/addons/website_livechat/static/tests/helpers/model_definitions_setup.js

/** @odoo-module **/

import { addModelNamesToFetch, insertModelFields } from '@bus/../tests/helpers/model_definitions_helpers';

addModelNamesToFetch(['website.visitor']);
insertModelFields('mail.channel', {
    history: { string: 'History', type: 'string' },
});
insertModelFields('website.visitor', {
    history:  { string: 'History', type: 'string' },
    lang_name: { string: "Language name", type: 'string'},
    website_name: { string: "Website name", type: 'string' },
});