Section::changeFields

private function changeFields(array $fields)
{
	foreach ($this->changedFields as $fieldId => $fieldValue)
	{
		if (array_key_exists($fieldId, $fields))
		{
			$fields[$fieldId] = $fieldValue;
		}
	}

	foreach ($this->changedFieldsForChildSections as $fieldId => $fieldValue)
	{
		if (array_key_exists($fieldId, $fields))
		{
			$fields[$fieldId] = $fieldValue;
		}
	}

	return $fields;
}