Stack two QMenuBars instead of side by side?

[killerwookie99]

I am trying to figure this out, but have not reached a solution thus far.

Problem:

QMenuBar *menubar1 = addToolBar(tr("blah"));
QMenuBar *menubar2 = addToolBar(tr("blah2"));

QMenuBar *menubar1 = addToolBar(tr("blah"));
QMenuBar *menubar2 = addToolBar(tr("blah2"));

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When it launches in a mainwindow it's like this:

[menubar1] | [menubar2]

I would like it to appear like this:

[menubar1]
[menubar2]

How is this accomplished?