p-dataTable在页面加载时展开行

<p-dataTable [value]="data" expandableRows="true" [expandableRowGroups]="expandableRowGroups">
  <ng-template pTemplate="header">
    <tr>
      <th>Column 1</th>
      <th>Column 2</th>
      <th>Column 3</th>
    </tr>
  </ng-template>
  <ng-template pTemplate="body" let-rowData let-expanded="expanded">
    <tr>
      <td>{{rowData.column1}}</td>
      <td>{{rowData.column2}}</td>
      <td>{{rowData.column3}}</td>
    </tr>
    <tr *ngIf="expanded">
      <td colspan="3">
        <!-- 展开行的内容 -->
        <p>详细信息：{{rowData.details}}</p>
      </td>
    </tr>
  </ng-template>
</p-dataTable>