/**
  * @param Varien_Data_Collection_Db $collection
  * @param \stdClass|null            $pager
  *
  * @return boolean
  */
 public function applyPager($collection, $pager)
 {
     if ($pager->pageSize && $pager->page) {
         $collection->setCurPage($pager->page);
         $collection->setPageSize($pager->pageSize);
         if ($collection->getCurPage() != $pager->page) {
             return false;
         }
     }
     return true;
 }