title: How to set the first row selected by default in ag grid (Angular)
body: <p>How to set the ag-grid first row selected by default in angular.</p>
  
  <p>here's the code:
  <a href="https://stackblitz.com/edit/ag-grid-angular-hello-world-xabqct?file=src/app/app.component.ts" rel="nofollow noreferrer">https://stackblitz.com/edit/ag-grid-angular-hello-world-xabqct?file=src/app/app.component.ts</a></p>
  
  <p>I want the first row is selected by default when opening the application.</p>