Navigation list item in OpenUI5

Hi,

I have used navigation list of Open ui5. When I click on expand icon of list item it expands the item showing subitems.

My requirement is when I click on expand icon it should expand the corresponding sub items and also should collapse the other list items if expanded.

So, I should perform action when user clicks on icon, but there is not event triggered when icon is clicked.

Can anyone help me to achieve this?

Regards,

Tejaswi