public function visitFunction(ASTFunction $function)
{
$xml = end($this->xmlStack);
$doc = $xml->ownerDocument;
$functionXml = $doc->createElement('function');
$functionXml->setAttribute('name', Utf8Util::ensureEncoding($function->getName()));
$functionXml->setAttribute('start', Utf8Util::ensureEncoding($function->getStartLine()));
$functionXml->setAttribute('end', Utf8Util::ensureEncoding($function->getEndLine()));
$this->writeNodeMetrics($functionXml, $function);
$this->writeFileReference($functionXml, $function->getCompilationUnit());
$xml->appendChild($functionXml);
}