Swift_Mime_SimpleMimeEntity::sortChildren PHP Method

    private function sortChildren()
    {
        $shouldSort = false;
        foreach ($this->immediateChildren as $child) {
            // NOTE: This include alternative parts moved into a related part
            if ($child->getNestingLevel() == self::LEVEL_ALTERNATIVE) {
                $shouldSort = true;
                break;
            }
        }
        // Sort in order of preference, if there is one
        if ($shouldSort) {
            usort($this->immediateChildren, array($this, 'childSortAlgorithm'));
        }
    }