title: how to create different row group of different employees with same name in AG-grid?
body: <p>Grouping employees by their names but employees with same name are also grouping together.
  i want group them according to their Id but don't want to show Id in grid.</p>
  
  <p>[{ Id: 1, employee: John}, { Id: 2, employee: John }, {  Id: 3, employee: John },]</p>
  
  <p>how i can group them according to their Ids.</p>