title: Adding ID to ag-grid row
body: <p>I would like to identify the <code>div</code>s representing the rows of my <code>ag-grid</code>.</p>
  
  <p>What I've tried:</p>
  
  <pre><code>onGridReady(params) {
    this.gridApi = params.api;
    this.gridApi.forEachNode(rowNode =&gt; {
      rowNode.setId('opo-item-index-'+rowNode.data.lineIndex);
      rowNode.id = 'opo-item-index-'+rowNode.data.lineIndex;
    });
  }
  </code></pre>
  
  <p>Neither of those has worked. Is there any other way to achieve this? The identifier doesn't have to be in <code>id</code> attribute, it could as well be in <code>data-*</code></p>
  
  <p>Thanks :)</p>