Ion-tabs: how to reset the tab stack navigation when a tab is selected

I wish that everytime a tab is clicked the navigation stack for that tab is resetted.
This is done by ionic2 itself clicking two times.
I used this approach, is it correct?

on ion-tabs added the event:


and the method:

	public doChange(ev:any) {
		if (ev.length()>1) {
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This does work but the page loads with the original stack and then pops to root. Does anyone know how to clear the stack first to prevent this?