ViewExecutable::setItemsPerPage

public ViewExecutable::setItemsPerPage($items_per_page)

public function setItemsPerPage($items_per_page) {
  // Check whether the element is pre rendered. At that point, the cache keys
  // cannot longer be manipulated.
  if (empty($this->element['#pre_rendered'])) {
    $this->element['#cache']['keys'][] = 'items_per_page:' . $items_per_page;
  }
  $this->items_per_page = $items_per_page;

  // If the pager is already initialized, pass it through to the pager.
  if (!empty($this->pager)) {
    $this->pager->setItemsPerPage($items_per_page);
  }
}