title: how to open mat-autocomplete panel on the 'optionSelected' event of another mat-autocomplete?
body: <p>how to open mat-autocomplete panel on the (option-Selected) event of another mat-autocomplete</p>
  
  <p>please refer the example here <a href="https://stackblitz.com/edit/angular-material-autocomplete-mqnxp5" rel="nofollow noreferrer">https://stackblitz.com/edit/angular-material-autocomplete-mqnxp5</a></p>