function listAction(KalturaCategoryFilter $filter = null)
{
$kparams = array();
if ($filter !== null) {
$this->client->addParam($kparams, "filter", $filter->toParams());
}
$this->client->queueServiceActionCall("category", "list", $kparams);
if ($this->client->isMultiRequest()) {
return null;
}
$resultObject = $this->client->doQueue();
$this->client->throwExceptionIfError($resultObject);
$this->client->validateObjectType($resultObject, "KalturaCategoryListResponse");
return $resultObject;
}
