public function restrict_fields($rules)
{
$rules->translation_0_should_not_be('empty_string');
$rules->translation_1_should_not_be('empty_string');
$rules->translation_2_should_not_be('empty_string');
$rules->translation_3_should_not_be('empty_string');
$rules->translation_4_should_not_be('empty_string');
$rules->translation_5_should_not_be('empty_string');
$rules->status_should_not_be('empty');
$rules->original_id_should_be('positive_int');
$rules->translation_set_id_should_be('positive_int');
$rules->user_id_should_be('positive_int');
$rules->user_id_last_modified_should_not_be('empty_string');
}