Implements \Drupal\Core\Entity\Query\QueryInterface::pager().
public function pager($limit = 10, $element = NULL) {
// Even when not using SQL, storing the element PagerSelectExtender is as
// good as anywhere else.
if (!isset($element)) {
$element = PagerSelectExtender::$maxElement++;
}
elseif ($element >= PagerSelectExtender::$maxElement) {
PagerSelectExtender::$maxElement = $element + 1;
}
$this->pager = array(
'limit' => $limit,
'element' => $element,
);
return $this;
}