/**
  * Sets the number of results per page
  *
  * @param int $pageSize The requested page size
  * @return $this
  * @throws IntercomException If the page size is not between 1 and 60
  */
 public function setPageSize($pageSize)
 {
     if ($pageSize < 1 || $pageSize > 60) {
         throw new IntercomException('Page size on the iterator must be between 1 and 60');
     }
     return parent::setPageSize($pageSize);
 }