private function updateComments(Tracker_Artifact_Changeset $changeset, SimpleXMLElement $xml_changeset)
{
if (isset($xml_changeset->comments) && count($xml_changeset->comments->comment) > 1) {
$all_comments = $xml_changeset->comments->comment;
for ($i = 1; $i < count($all_comments); ++$i) {
$changeset->updateComment((string) $all_comments[$i]->body, $this->getSubmittedBy($all_comments[$i]), (string) $all_comments[$i]->body['format'], $this->getSubmittedOn($all_comments[$i]));
}
}
}