Checkbox in Treeview on UI5

Hello,

I am trying to create a tree view with checkbox selections and am unable to do it in UI5. I read somewhere that we can install external widgets if someone provides. Below are the 2 questions:

1) Is there a possibility of adding checkbox in a tree view in UI5?

2) In case we use an external widget, how can we integrate the external widget in WEB IDE?

Thanks,

Charles