nise/nise-frontend/src/corelib/components/query-builder/query-builder.component.html

<fieldset>
  <legend>Query Builder</legend>
  <button (click)="addQuery()">+ Predicate</button>
  <div *ngFor="let query of queries; let i = index">
    <app-query [query]="query" [fields]="fields" (removeQuery)="removeQuery(i)" (queryChanged)="queryChanged()"></app-query>
  </div>
</fieldset>