Extend form fields with Yaml Parser

Plugin.php

<?php

namespace Vitae\Vita;

use System\Classes\PluginBase;
use Backend\Models\User as BackendUserModel;
use Backend\Controllers\Users as BackendUsersController;
use Vitae\Vita\Controllers\MyAccount;
use Yaml;
use Event;

class Plugin extends PluginBase
{
    public function boot()
    {
        BackendUserModel::extend(function ($model)
    	{
            $model->addDynamicMethod('getCountryOptions', function() use ($model) {
                return [
                    1 => 'Ukraine',
                    2 => 'Germany',
                ];
            });

            $model->addDynamicMethod('getFamilystatusOptions', function() use ($model) {
                return [
                    1 => 'Married',
                    2 => 'Single',
                ];
            });

            $model->addDynamicMethod('getDenominationOptions', function() use ($model) {
                return [
                    1 => 'One',
                    2 => 'Two',
                ];
            });
    	});
        
        Event::listen('backend.form.extendFields', function ($widget) {
            if (!$widget->getController() instanceof BackendUsersController && !$widget->getController() instanceof MyAccount) {
                return;
            }

            if (!$widget->model instanceof BackendUserModel) {
                return;
            }

            // Ensures that Profile always exists
            ProfileModel::getFromUser($widget->model);

            $configFile = Yaml::parseFile(__DIR__ . '/models/profile/fields.yaml');
            $widget->addTabFields($configFile);
            $widget->removeTab('backend::lang.user.groups');
    	});
    }
}