title: Ag Grid not displaying column values for which grouping by row is enabled angular 8
body: <p>I am working with Ag-Grid version 21.1.0 and Angular 8. I am trying row-grouping in ag-grid following the tutorial: <a href="https://www.ag-grid.com/javascript-grid-grouping/" rel="nofollow noreferrer">https://www.ag-grid.com/javascript-grid-grouping/</a> I have a field in my data-model as "Short Name" field and I am trying to group by this field by setting "rowGroup"="true" property of corresponding column-def object. A new column called "Group" is created in the Ag-grid but the values for this newly created column are not displayed by the grid.<a href="https://i.stack.imgur.com/YmiUI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YmiUI.png" alt="enter image description here"></a>
  I am using server side filtering and sorting for the grid and using rowmodeltype="infinite". Kindly help me where I am going wrong.</p>
  
  <p>Update:
  I am creating a list of column Metadata Objects dynamically. For the specific column by which I want to group the data, I am setting the
  following attributes:</p>
  
  <pre><code>  columnMetaObj.rowGroup = true;
    columnMetaObj.enableRowGroup = true;
    columnMetaObj.hide = true;
  </code></pre>
  
  <p>then finally I am setting grid options as follows:</p>
  
  <pre><code>    this.gridOptions.columnDefs = this.gridColDataInput.columnDefs;
      this.gridOptions.rowModelType = 'infinite';
      this.gridOptions.cacheBlockSize = 100;
      this.gridOptions.paginationPageSize = 100;
  </code></pre>