function __construct($label, $contentSrc = null, $id = null, $navClass = null, $isNavHidden = false, $writingDirection = null)
{
$this->setLabel($label);
$this->setContentSrc($contentSrc);
$this->setId($id);
$this->setNavClass($navClass);
$this->setNavHidden($isNavHidden);
$this->setWritingDirection($writingDirection);
}