Angular bootstrap accordion panel animation

Question

I use angular bootstrap accordion with pannels I want to create open/close animate for the pannels

<ngb-accordion>
  <ngb-pannel>
   <ng-template ngbPannelTitle><ng-template>
   <ng-template ngbPannelContent><ng-template>
  </ngb-pannel>
  <ngb-pannel>
   <ng-template ngbPannelTitle><ng-template>
   <ng-template ngbPannelContent><ng-template>
  </ngb-pannel>
</ngb-accordion>