code: public function putPagePartial($page, $partial)
      {
          if (null === $partial || is_string($partial) || is_array($partial)) {
              $this->pagePartials[$page] = $partial;
          }
  
          return $this;
      }
docs: Sets which partial view script to use for rendering menu
  @param    string $page
  @param    string|array $partial partial view script or null. If an array is
  given, it is expected to contain two
  values; the partial view script to use,
  and the module where the script can be
  found.
  @return Menu