PHP - Rackspace CloudFiles API check if the file path already exists?

I'm working with the Rackspace CloudFiles API, where I've got a requirement to check for folder exists inside a container.

I have searched across different areas I could find solution to find if container exists or the object exists.

For example:

Format: container/folder/subfolder/file

Actual file stored location: test/test_folder/test_subfolder/test.txt

I want to know is my container has already got a folder called test_folder

And I came across something which says path, but am not sure we have this method exists!

getObjects ->> 'path', 'file path to search'

Even though @hurricanerix answer helped me, I want to post exact PHP method and snippet to help other is future.

$client = new Rackspace(Rackspace::US_IDENTITY_ENDPOINT, array(
    'username' => 'XXXXXXXX',
    'apiKey'   => 'XXXXXXXXXXXXXXXXXXX'
));

$total              = 0;
$containerObjects   = array();
$objectStoreService = $client->objectStoreService(null, 'XX');
$container          = $objectStoreService->getContainer('test');
$objData = $container->ObjectList(array('prefix'=>"test_folder/", 'delimiter'=>"/"));
if(is_object($objData))
{
    $total = $objData->count();
    if ($total == 0)
        break;

    foreach ($objData as $object) {
        $containerObjects[] = $object->getName();
    }
}

var_dump($containerObjects);

Output

array (size=1)
  0 => string 'test/test_folder/test_subfolder/' (length=32)

Hope this will help.