如果嵌套的ng-repeat不是空的，如何只显示一个元素?

I have a List of lists, created with a nested ng-repeat. Each outer ng-repeat contains a div with the label of its inner list (eg: "Group A"). I'm now trying to create a way to avoid showing this label if the inner list is empty due to filtering(Applied by an input searchtext)I have a List of lists, created with a nested n