Popover 2-way binding ngModel value to parent component

Hi could any one create a rather simpler example on how to pass simple selected radio-group value two way binding to a “parent” component i suppose? :disappointed_relieved:

The document source code is using a rather complicated example.
I simply want to create a popover with radio-group selection with 2 way-binding:

  1. get initial/selected value from “parent” component :mag:
  2. user open popover :eye:
  3. popover radio group buttons shows what is selected :bulb:
  4. user choose from radio group buttons :ballot_box_with_check:
  5. popover closes and “parent” component shows new selected value :dark_sunglasses:

thanks… I cant really make sense of that.