<p-treeTable [value]="filesToggle" [columns]="selectedToggle">
  <ng-template pTemplate="caption">
    <div style="text-align:left">
      <p-multiSelect [options]="cols" [(ngModel)]="selectedToggle" optionLabel="header" selectedItemsLabel="{0} columns selected" [style]="{'width': '20em'}" defaultLabel="Choose Columns"></p-multiSelect>
    </div>
  </ng-template>
  <ng-template pTemplate="header" let-columns>
    <tr>
      <th *ngFor="let col of columns">
        { { col.header } }
      </th>
    </tr>
  </ng-template>
  <ng-template pTemplate="body" let-rowNode let-rowData="rowData" let-columns="columns">
    <tr>
      <td *ngFor="let col of columns; let i = index">
        <p-treeTableToggler [rowNode]="rowNode" *ngIf="i == 0"></p-treeTableToggler>
        { { rowData[col.field] } }
      </td>
    </tr>
  </ng-template>
</p-treeTable>