Allows to declare anglar variables in the template to unify subscriptions for example

angular template variables example

<div *ngIf='{
       userActions:(dataService.userActions$|async)
       } as globalBag'
>

  <ng-container *ngIf='{
  timepointCount:(globalBag.timePoints.length),
  widthObject:({"width.%": globalBag.zoomValue+""})
  }as lowerBag'
  >
  {{globalBag.userActions|json}}
  </ng-container>
  
</div>