public function has_tariffs($column_name1, $comparison1, $value1, $delimiter = '', $column_name2 = '', $comparison2 = '', $value2 = '')
{
$role = new role();
return $role->has_tariffs($this->id, $column_name1, $comparison1, $value1, $delimiter, $column_name2, $comparison2, $value2);
}
