Merge pull request #2180 from microsoft/connor4312/issue2173

fix test

Author: connor4312

src/telemetry/vscodeExperimentationService.ts

@@ -54,7 +54,7 @@ export class VSCodeExperimentationService implements IJsDebugExpService, IDispos
   dispose(): void {
     // See microsoft/tas-client#74
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const polling = (this.service as any).pollingService;
+    const polling = (this.service as any)?.pollingService;
     polling?.StopPolling();
   }