Merge pull request #8889 from IgniteUI/simeonoff/fix-8869-10.2.x

docs(radio-group): hide ngAfterContentInit in typedoc

Author: simeonoff

projects/igniteui-angular/src/lib/directives/radio/radio-group.directive.ts

@@ -235,6 +235,10 @@ export class IgxRadioGroupDirective implements AfterContentInit, ControlValueAcc
      */
     private destroy$ = new Subject<boolean>();
 
+    /**
+     * @hidden
+     * @internal
+     */
     ngAfterContentInit() {
         // The initial value can possibly be set by NgModel and it is possible that
         // the OnInit of the NgModel occurs after the OnInit of this class.