src/vs/workbench/services/userDataSync/browser/userDataSyncWorkbenchService.ts/UserDataSyncWorkbenchService/onDidChangeStorage
class UserDataSyncWorkbenchService:	private onDidChangeStorage(e: IStorageValueChangeEvent): void {
		if (e.key === UserDataSyncWorkbenchService.CACHED_SESSION_STORAGE_KEY && e.scope === StorageScope.APPLICATION
			&& this.currentSessionId !== this.getStoredCachedSessionId() /* This checks if current window changed the value or not */) {
			this._cachedCurrentSessionId = null;
			this.update();
		}
	}