KStatusNotifierItem.showMessage() with custom icon

In regards to <a href="" title=""></a>

I am thinking to add an option to show notification when layout changes,
and I already set the tooltip with text and my custom icon (if flags are
shown) but showMessage() currently takes icon as QString. The question
is can I pass QIcon to showMessage() somehow the same way I do with
setToolTipIconByPixmap() ?

Or alternatively can I force the (already set) tooltip to show for short
period of time?