if (xmlStreamReader.name() == "unknownElement") { xmlStreamReader.raiseError("Unknown element encountered: " + xmlStreamReader.name().toString()); }
if (xmlStreamReader.attributes().value("requiredAttribute").isEmpty()) { xmlStreamReader.raiseError("Missing required attribute: requiredAttribute"); }The QXmlStreamReader is a part of the Qt Core module. Therefore, the package library for this class is likely Qt.