How to programmatically select a angular bootstrap nav tab from a component class

Hi how can I obtain a reference to a ngbNav ng-bootstrap component in my component class so I can select some tab programmatically? This doesnt work:

@ViewChild('nav') nav? : ElementRef<NgbNav>;


In my html template I have:

<ul ngbNav #nav="ngbNav" [(activeId)]="active" (navChange)="onNavChange($event)" class="nav-tabs">

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