QHelp documentation example code is wrong

QHelpEngineCore helpEngine("mycollection.qhc");
helpEngine.setUsesFilterEngine(true);

...

// get all file references for the identifier
QList<QHelpLink> links =
    helpEngine.documentsForIdentifier(QLatin1String("MyDialog::ChangeButton"));

// If help is available for this keyword, get the help data
// of the first file reference.
>;if (links.count()) {
    QByteArray helpData = helpEngine->fileData(links.cbegin()->url);
    // show the documentation to the user
    if (!helpData.isEmpty())
        displayHelp(helpData);
}