public function __construct($oFactory, $sPageSlug)
{
$this->_oFactory = $oFactory;
$this->_sPageSlug = $sPageSlug;
$this->_oFactory->addInPageTabs($this->_sPageSlug, array('tab_slug' => $this->_sTabSlug, 'title' => __('Feedback', 'admin-page-framework-loader')));
// load + page slug + tab slug
add_action('load_' . $this->_sPageSlug . '_' . $this->_sTabSlug, array($this, 'replyToAddFormElements'));
}