/**
* Loads one page of resource into iterator.
*/
private function load()
{
if ($this->pageIterator === NULL || !$this->pageIterator->valid()) {
$this->pageIterator = new IteratorIterator($this->resourceLoader->getNextPage());
$this->pageIterator->rewind();
if (!$this->pageIterator->valid()) {
$this->counter = NULL;
}
}
}