deselectValues<k> method Null safety

  1. @override
void deselectValues<k>(
  1. List<k> values
)

deselect some/one item(s) in group values : (dynamic) value(s) of item(s) that should deselected

Implementation

@override
void deselectValues<k>(List<k> values) {
  assert(isMultipleSelection,
      "you cannot deselect multiple items in single selection group");
  if(!isMultipleSelection){
    throw Exception("you cannot deselect multiple items in single selection group");
  }
  _widgetState.deselectValues(values);
}