scripting API: QFileDialog: 'identifier' argument not documented

https://doc.qt.io/qtinstallerframework/scripting-qfiledialog.html

"For automatic installations, --file-query with identifier=value pairs can be given separated with a comma. " 

However, there is no "identifier" argument in the documentation of QFileDialog methods. QMessageBox methods have "identifier" as first argument. And after a lot of digging in the sources I found that QFileDialogProxy has an identifier as last argument. Thus I tried to pass an identifier as fourth argument to QFileDialog.getOpenFileName and - it actually worked.

At the very minimum, document the identifier argument as is. Ideally be consistent between QMessageBox and QFileDialog and take identifiers as either first or last argument everywhere? Thanks.