Find method references through base abstract classes implementing an interface (#61234)

tests/cases/fourslash/referencesForInheritedProperties10.ts

@@ -0,0 +1,25 @@
+/// <reference path='fourslash.ts'/>
+
+//// interface IFeedbackHandler {
+////   /*1*/handleAccept?(): void;
+////   handleReject?(): void;
+//// }
+////
+//// abstract class AbstractFeedbackHandler implements IFeedbackHandler {}
+////
+//// class FeedbackHandler extends AbstractFeedbackHandler {
+////   /*2*/handleAccept(): void {
+////     console.log("Feedback accepted");
+////   }
+////
+////   handleReject(): void {
+////     console.log("Feedback rejected");
+////   }
+//// }
+////
+//// function foo(handler: IFeedbackHandler) {
+////   handler./*3*/handleAccept?.();
+////   handler.handleReject?.();
+//// }
+
+verify.baselineFindAllReferences('1', '2', '3');