What is QComboBoxPrivateContainer and why is it appearing in my top level widgets?

[CJha]

Hi, I have a .ui file with an editable QComboBox when I check the top qApp->topLevelWidgets() I get a top level widget with class name QComboBoxPrivateContainer and no object name or window title. This does not appear if I my QComboBox is not editable.

To reproduce, just add a editable QComboBox to the .ui file, fill it with any values if you like and show the top level widgets (on something like push button clicked signal, that's what I am doing):

void MainWindow::on_pushButton_clicked()
{
	QWidgetList widList = qApp->topLevelWidgets();
	for (auto wid : widList)
		qDebug() << wid->metaObject()->className() << wid->objectName() << wid->windowTitle();
}

The output:

MainWindow "MainWindowClass" "MainWindow"
QComboBoxPrivateContainer "" ""

The only reference I could find for this class is from Qt 4.8: https://dreamswork.github.io/qt4/classQComboBoxPrivateContainer.html

On Qt Documentation (https://doc.qt.io/) there is no reference to it.

I am just curious as to what it is and if I should just ignore it or is there anything I can do to get it out of my qApp->topLevelWidgets() list?

[JonB]

@CJha
So it's obviously internal. Ignore it, and no you won't be able to alter what qApp->topLevelWidgets() returns, just remove any QComboBoxPrivateContainers.