class MockFileTransfer

class MockFileTransfer {
    
    /**
     * Returns a Drupal\system_test\MockFileTransfer object.
     *
     * @return \Drupal\system_test\MockFileTransfer
     *   A new Drupal\system_test\MockFileTransfer object.
     */
    public static function factory() {
        return new MockFileTransfer();
    }
    
    /**
     * Returns a settings form with a text field to input a username.
     */
    public function getSettingsForm() {
        $form = [];
        $form['system_test_username'] = [
            '#type' => 'textfield',
            '#title' => t('System Test Username'),
        ];
        return $form;
    }

}