Extending YAML and model class in OctoberCMS

Plugin.php

<?php

// ...

public function boot()
{
    UserModel::extend(function($model) {
        $model->addFillable([
            'phone',
            'mobile',
            'company',
            'street_addr',
            'city',
            'zip'
        ]);

        $model->implement[] = 'RainLab.Location.Behaviors.LocationModel';
    });

    UsersController::extendFormFields(function($widget) {
        $configFile = __DIR__ . '/config/profile_fields.yaml';
        $config = Yaml::parse(File::get($configFile));
        $widget->addTabFields($config);
    });
}

// ...