QString s = "test";
QNetworkRequest request(QUrl(s));
request.setRawHeader(QByteArray(""), QByteArray(""));
QNetworkRequest request;
request.setRawHeader("", "");
QVariant ModelTable::data(const QModelIndex &index, int role) const {
//...
if (role == Qt::BackgroundRole)
return QBrush(QColor("#123"));
//...
}