public function getFilterKey($action = null)
    {
        // controller.action
        $controller = $this->getName();
        return $action ? $controller . '.' . $action : $controller;
    }
public function getFilterKey($action = null)
    {
        // controller.action
        $controller = $this->getName();
        return $action ? $controller . '.' . $action : $controller;
    }
public function getFilterKey ( $ action = null ) { // controller.action $ controller = $ this -> getName ( ) ; return $ action ? $ controller . '.' . $ action : $ controller ; }
Get filter key

@param   string  $action
@return  string
Get filter key