function getChildrenByTag($tag, $compare = 'total', $recursive = true)
{
if ($this->childCount() < 1) {
return array();
}
$tag = explode(' ', strtolower($tag));
$match = isset($tag[1]) && $tag[1] === 'not' ? 'false' : 'true';
return $this->getChildrenByMatch(array('tags' => array($tag[0] => array('match' => $match, 'compare' => $compare))), $recursive);
}