public function isViewable($action = null)
    {
        if ($action === Action::IDENTIFIER) {
            return false;
        }

        return $this->isVisible($action);
    }
public function isViewable($action = null)
    {
        if ($action === Action::IDENTIFIER) {
            return false;
        }

        return $this->isVisible($action);
    }
public function isViewable ( $ action = null ) { if ( $ action === Action :: IDENTIFIER ) { return false ; } return $ this -> isVisible ( $ action ) ; }
Can this field be viewed?
@param null $action
@return bool
Can this field be viewed?