/**
* Creates embedded message path composed of ancestor messages
* seperated by slash "/". If message has no ancestor returns empty string.
*
* @param DescriptorInterface $descriptor message descriptor
*
* @return string
*/
private function _createEmbeddedMessagePath(DescriptorInterface $descriptor)
{
$containing = $descriptor->getContaining();
$path = array();
while ($containing) {
$path[] = $containing->getName();
$containing = $containing->getContaining();
}
array_reverse($path);
return implode("/", $path);
}