I want to create a new clickable many2many widget
for odoo16 

my code is:

odoo.define('my_module.many2many_widget', function (require) {
    "use strict";

    var core = require('web.core');
    var dialogs = require('web.view_dialogs');
    var registry = require('web.field_registry');
    var rel_fields = require('web.relational_fields');
    var _t = core._t;

    var FieldMany2ManyTagLinks = rel_fields.FieldMany2ManyTags.extend({
        get_badge_id: function (el) {
            if ($(el).hasClass('badge')) return $(el).data('id');
            return $(el).closest('.badge').data('id');
        },
        events: _.extend({}, rel_fields.FieldMany2ManyTags.prototype.events, {
            'click .badge': function (e) {
                e.stopPropagation();
                var self = this;
                var record_id = this.get_badge_id(e.target);
                new dialogs.FormViewDialog(self, {
                    res_model: self.field.relation,
                    res_id: record_id,
                    context: self.record.getContext(),
                    title: _t('Open: ') + self.field.string,
                    readonly: !self.attrs.can_write,
                }).on('write_completed', self, function () {
                    self.dataset.cache[record_id].from_read = {};
                    self.dataset.evict_record(record_id);
                    self.render_value();
                }).open();
            }
        })
    });
    registry.add('many2many_tags_links', FieldMany2ManyTagLinks);

    return {
        FieldMany2ManyTagLinks: FieldMany2ManyTagLinks
    };

});

and am getting the following error

TypeError: FormView is not a constructor

How to solve this please?