<p-treeTable [value]="filesEdit" [columns]="cols">
  <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" ttEditableColumn [ngClass]="{'p-toggler-column': i === 0}">
        <p-treeTableToggler [rowNode]="rowNode" *ngIf="i === 0"></p-treeTableToggler>
        <p-treeTableCellEditor>
          <ng-template pTemplate="input">
            <input pInputText type="text" [(ngModel)]="rowData[col.field]">
          </ng-template>
          <ng-template pTemplate="output">{ { rowData[col.field] } }</ng-template>
        </p-treeTableCellEditor>
      </td>
    </tr>
  </ng-template>
</p-treeTable>