/** * Check if it is no workspace preview * * @param TypoScriptFrontendController $frontendController * @param string $uri * @param array $explanation * @param bool $skipProcessing * * @return array */ public function checkRule($frontendController, $uri, &$explanation, &$skipProcessing) { if ($frontendController->doWorkspacePreview()) { $explanation[__CLASS__] = 'The page is in workspace preview mode'; } }