function filterHeader($arg)
 {
     if (is_admin()) {
         return $arg;
     }
     // is_feed() is not ready, because the WP query may not be run yet.
     if (strpos($_SERVER['REQUEST_URI'], 'feed') !== false) {
         return $arg;
     }
     if (EzGA::isKilled()) {
         return $arg;
     }
     $show_leadin = $this->options['show_leadin'];
     if ($show_leadin != 'no') {
         $metaOptions = EzGA::getMetaOptions();
         if (empty($metaOptions['adsense']) || !empty($metaOptions['adsense']) && $metaOptions['adsense'] != 'no') {
             EzGA::$metaOptions['show_leadin'] = '';
             echo $this->mkAdBlock("leadin");
             EzGA::$metaOptions = array();
         }
     }
     return $arg;
 }