public function getTagItem($tag_name)
 {
     return Helper::findTagByCommonName($this, $tag_name);
 }
 public function getTagItem($tag_name)
 {
     $tags = $this->getData();
     $found = Helper::findTagByCommonName($tags, $tag_name);
     if (!empty($found)) {
         return $found;
     } else {
         return $this->items->getTagItem($tag_name);
     }
 }