should::filterData

static function filterData(array $data, array $fieldMap, Collection $errors)
{
	// READ, WRITE, SORT, FILTER, DATE

	foreach($data as $field => $value)
	{
		$start = mb_substr($field, 0, 3);
		if($start == 'UF_' || $start == static::SE_PREFIX) // we have no other fields that start from SE_ or UF_, so allow
		{
			continue;
		}

		if(!isset($fieldMap[$field]))
		{
			$errors->add('UNKNOWN_FIELD', 'Unknown field given: "'.$field.'"', Collection::TYPE_FATAL, array('FIELD' => $field));
		}
		elseif(!$fieldMap[$field][1]) // WRITE
		{
			$errors->add('FIELD_NOT_ALLOWED', 'Field is not allowed to write: "'.$field.'"', Collection::TYPE_FATAL, array('FIELD' => $field));
		}
	}

	return $data;
}