code: public function ReviewContentForm(HTTPRequest $request)
      {
          // Get ID either from posted back value, or url parameter
          $id = $request->param('ID') ?: $request->postVar('ID');
          return $this->getReviewContentForm($id);
      }
docs: URL handler for the "content due for review" form
  
  @param HTTPRequest $request
  @return Form|null