title: Aggrid ITooltipAngularComp not showing
body: <p>I try to use ITooltipAngularComp to show a custom toolitp on ag grid angular ( v 20.1.0 ).</p>
  
  <p>Here is the ag-grid call : </p>
  
  <pre><code>&lt;ag-grid-angular
      class="ag-theme-balham"
      rowSelection="single"
      (gridReady)="onGridReady($event)"
      [gridOptions]="gridOptions"
      [defaultColDef]="defaultColDef"
      [frameworkComponents]="frameworkComponents"
      &gt;
  &lt;/ag-grid-angular&gt;
  </code></pre>
  
  <p>With :</p>
  
  <pre><code>defaultColDef = {
    "tooltipComponent": "tooltipRenderer"
  } 
  
  gridOptions = {
    "autoGroupColumnDef": {
      "field": "agent",
      "headerName": "Agents",
      "cellRenderer": "agGroupCellRenderer",
      "cellRendererParams": {
        "innerRenderer": "agentCellRenderer"
      }
    },
    "groupUseEntireRow": false,
    "suppressContextMenu": true
  }
  
  frameworkComponents = {
      calendarMonthCell: CustomMonthCellComponent,
      groupRowInnerRenderer: CustmGroupRowComponent,
      tooltipRenderer: TooltipComponent
    };
  </code></pre>
  
  <p>But, I can't see the tooltip when hovering with the mouse on cells ...
  TooltipComponent is a ITooltipAngularComp (and do compile) and other custom renderers are working as intended ... I also tried without custom cell renderer.
  I used the tutorial here :
  <a href="https://www.ag-grid.com/javascript-grid-tooltip-component/" rel="nofollow noreferrer">https://www.ag-grid.com/javascript-grid-tooltip-component/</a></p>
  
  <p>Here is something similare to what I do, and that is not working either ( I hope I have not forgotten any config doing this example ): 
  <a href="https://stackblitz.com/edit/angular-tmsdw8" rel="nofollow noreferrer">https://stackblitz.com/edit/angular-tmsdw8</a></p>
  
  <p>Anyone has an idea of my where my config is broken ?</p>